(d) All of them
Mahatma Gandhi National Rural Employment Guarantee Act is an Indian labour law and social security measure that aims to guarantee the ‘right to work’. Its main aim is to enhance livelihood security in rural areas by providing at least 100 days of wage employment in a financial year to every household whose adult members volunteer to do unskilled manual work. It started on 2 February, 2006 in 200 districts and covered all districts of India from 1 April, 2008.

(d) All of them
Availability of food means food production within the nation, food imports, and the previous years’ stock stored in government granaries.
Accessibility means food is within reach of every person in the nation.
Affordability implies that an individual has enough money to purchase sufficient, safe, and nutritious food to meet one’s dietary needs.

(d) All of the above
Essentially, batteries have three main parts: cathode, anode and electrolyte, which collect and discharge electricity. Different minerals are used for making these parts depending on the technology. For instance, rechargeable batteries in hybrid electric vehicles (EVs) use a nickel-metal hydride which involves rare earth elements.
The global scramble is particularly high for lithium, cobalt, nickel, copper and graphite that are key to the dominant lithium ion (Li-ion) batteries, used to power anything from mobile phones to electric cars to power grids. These key minerals abound Earth’s crust.

(a) Relative humidity
The actual amount of the water vapour present in the atmosphere is known as the absolute humidity. The percentage of moisture present in the atmosphere as compared to its full capacity at a given temperature is known as the relative humidity.

(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.