Explanation
- A
Sugarcane
Sugarcane. Highest water use among the four; flood/furrow cane is thirsty.
- B
Sunflower
Sunflower. Oilseed; far less water than cane.
- C
Pearl millet
Pearl millet. A dryland millet.
- D
Red gram
Red gram. Pulse; relatively water-efficient.
Summary. Official key is (a) sugarcane. Among these four it is the least water-efficient. Bajra, arhar and sunflower are the dryland/oilseed contrast.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2025 · Q28 · General Studies · 2 marks
Consider the following statements: Statement I: In the context of effect of water on rocks, chalk is known as a very permeable rock whereas clay is known as quite an impermeable or least permeable rock. Statement II: Chalk is porous and hence can absorb water. Statement III: Clay is not at all porous. Which one of the following is correct in respect of the above statements? -
2020 · Q87 · General Studies · 2 marks
"The crop is subtropical in nature. A hard frost is injurious to it. It requires at least 210 frost-free days and 50 to 100 centimeters of rainfall for its growth. A light well-drained soil capable of retaining moisture is ideally suited for the cultivation of the crop." Which one of the following is that crop?