A
Sugarcane
B
Sunflower
C
Pearl millet
D
Red gram
Correct answer: (a) Sugarcane
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.