Which of the following is a rabi crop of Rajasthan?

The correct answer is D, isabgol. Isabgol, the psyllium whose husk is used as a laxative and in medicines, is sown in the cool months after the monsoon and harvested in spring, which makes it a rabi crop. Rajasthan is the largest producer of isabgol in the country and grows it mainly in Jalore, Barmer, Sirohi and Nagaur, where the light sandy soils suit it.

Option A, bajra or pearl millet, is the classic kharif cereal of the Rajasthan desert, sown with the first rains of late June. Option B, guar or cluster bean, is also kharif and is raised for fodder and for the gum extracted from its seed. Option C, moth, is a kharif pulse of the dry west, often grown mixed with bajra. The test here is seasonal memory: sowing with the monsoon means kharif, sowing after it means rabi, and isabgol belongs to the second group with wheat, gram, mustard, barley and taramira.