(c) 1 and 4
Semiconductors are materials which have a conductivity between conductors (generally metals) and nonconductors or insulators (such as most ceramics). Semiconductors can be pure elements, such as silicon or germanium, or compounds such as gallium arsenide or cadmium selenide.
Silicon is most commonly used in manufacturing semiconductor devices. Earlier, the use of germanium was widespread, but silicon has replaced it due to its thermal hypersensitivity
Semiconductors are used in the manufacturing of various kinds of electronic devices, including diodes, transistors, and integrated circuits. They are also used in a range of applications, including electronic products, IT hardware, defense technology, industrial electronics, medical electronics, automation, and Internet of Things (IoT). Semiconductors are vital for electronics and computing, but there’s a global shortage due to high demand exceeding supply. This shortage impacts economic growth and jobs.

(c) Dr B.R. Ambedkar
The appointment of Election Commissioners falls under the purview of Article 324(2) of the Constitution.
The provision states, “The Election Commission shall consist of the Chief Election Commissioner and such number of other Election Commissioners, if any, as the President may from time to time fix and the appointment of the Chief Election Commissioner and other Election Commissioners shall, subject to the provisions of any law made in that behalf by Parliament, be made by the President.”
As per the ‘subject to’ clause, the number and tenure of the ECs are subject to the provisions of “any law made on that behalf by Parliament”.
Interestingly, during a debate in the Constituent Assembly about the draft article, Dr B.R. Ambedkar said, “… there is no use making the tenure of the Election Commissioner a fixed and secure tenure if there is no provision in the Constitution to prevent either a fool or a knave or a person who is likely to be under the thumb of the executive.”
The President appoints the CEC and two ECs on the advice of the Prime Minister and council of ministers. Under the Election Commission (Conditions of Service of Election Commissioners and Transaction of Business) Act, 1991, an EC can have a tenure of six years or up to the age of 65, whichever is earlier. Typically, the senior-most election commissioner is appointed as the CEC.

(b) Only two
Neo-Vaishnavism is a monotheistic religion that focuses on devotion rather than salvation. It was propagated by Srimanta Sankardeva in the 15th-16th century in Assam. It emphasized devotion to Lord Krishna, a central figure in Vaishnavism, and advocated for a more inclusive and egalitarian society. (Statement 1 is incorrect)
Vaishnavism is a religion that worships Lord Vishnu or one of his incarnations, like Lord Krishna or Lord Rama. Vaishnavites follow the Vaishnava tradition, which emphasizes devotion and surrender to Lord Vishnu or his incarnations.
Neo-Vaishnavism is against idol worship and does not acknowledge the Rādhā-Krishna cult. It focuses on devotion to Krishna through congregational listening and singing. The movement challenged the caste system and promoted social equality.

(d) 1—4—3—2
Chabahar, which sits at the mouth of the Gulf of Oman, is Iran’s first deepwater port that puts the country on the global oceanic trade route map.
The port lies to the west of Iran’s border with Pakistan, about as far as Gwadar, a competing port developed by China in Pakistan, lies to the east of the border.
Chabahar is strategically important for both Iran and India. It has the potential to assist Tehran avoid the effects of Western sanctions while also providing New Delhi with an alternative route that avoids Pakistan, which does not allow India land access for trade with Afghanistan and Central Asia.
The correct chronological order of these ports from west to east is Port of Hodeidah — Port of Duqm — Chabahar Port — Gwadar Port.

(a) 1, 2 and 3
Assam is located in the north-eastern part of India. – In the North, it is bounded by the kingdom of Bhutan and state of Arunachal Pradesh. – To the East, it is bounded by the states of Nagaland and Manipur. – To the West it is bounded by Bangladesh and states of Meghalaya and West Bengal.
West Bengal also shares its borders with three countries because of its narrow northward extension. Those countries are-Bangladesh to the East and Nepal and Bhutan in the North.
Mizoram is a landlocked state in North East India whose southern part shares 722 kilometers long international borders with Myanmar and Bangladesh, and northern part share domestic borders with Manipur, Assam and Tripura.