(c) All three
Irrigation Efficiency is the ratio of the quantity of water that is available for crop growth to the quantity of water supplied. Its value is represented in terms of percentage.
There are several factors that can affect irrigation efficiency, including the type of irrigation system used, the quality of the water, the soil type, and the weather conditions. For example, a drip irrigation system may be more efficient than a sprinkler system because it delivers water directly to the roots of the plants, reducing water loss due to evaporation.
Analysis of irrigation efficiencies is important in order to improve the irrigation facilities of a region. Irrigation efficiency can be enhanced by the use of proper tools and a sufficient amount of funding. There are several factors that need to be taken into consideration when analysing different irrigation efficiencies.

(a) Varieties of Oil Palm
Varieties of Oil Palm in India: There are 3 major varieties of oil palms available.
Tenera: This variety is ruling hybrid type and basically it is a cross of shell-less Pisifera (female) and thick shelled Dura (male). Tenera has a thin shell, medium to high mesocarp content and high oil content.
Dura: This variety is not commercially cultivated and it has thick shell of 2 to 8 mm.
Pisifera: This is a shell less fruit bearing variety.

(b) 1-3-2-4
Irrigation efficiency is the ratio between the amount of water used up by the crop to meet its consumption requirement and the amount of water needed to keep the salt balance in check. The depth and texture of the soil also have an important role to play.
When the soil is of the right depth and texture, fertilizers and minerals can evenly reach to the ground.
Clay has the highest proportion of organic matter. It has the highest porosity and lowest permeability. Therefore, the wet clods formed are highly stable.

(a) Only 1
India is the third largest fish producing country in the world, accounting for 8% of global fish production. India is also the second largest aquaculture producer in the world, after China.
The Blue Revolution was launched in 2015 as a Centrally Sponsored Scheme (BR-CSS) for a period of five years, from 2015-16 to 2019-20. The scheme’s main objective is to increase the production and productivity of fisheries, while also modernizing fisheries with new technologies. (Statement 2 in incorrect)

(b) Libya
Derna is a port city in eastern Libya. It is located on the Mediterranean coast between Benghazi and Tobruk. It is also located at the eastern end of the Jebel Akhdar, or “green mountains”.
Extreme weather, vulnerable geography, and crumbling infrastructure — coalesced into one catastrophe, causing the most devastating floods to have hit North Africa in almost a century.