Which of the following crops has higher water use efficiency?

Correct option is B

Potato has a higher water use efficiency (WUE) compared to the other listed crops.
Water Use Efficiency refers to the amount of biomass or yield produced per unit of water used.
Potato, being a short-duration crop with a shallow root system, efficiently utilizes the available moisture and produces a high yield per unit of water consumed.
It has been shown to produce more calories per liter of water compared to rice or wheat.
(a) Rice – One of the least water-efficient crops, requiring continuous flooding in many systems.
(b) Potato – Known for high yield per unit of water – correct answer.
(c) Wheat – More water-efficient than rice but less than potato.
(d) Maize – Considered moderately efficient but still lower than potato in WUE.