The founder of the Bishnoi sect, whose twenty nine rules forbid the felling of green trees, was:

The correct answer is A, Guru Jambheshwar. Jambheshwar, known affectionately as Jambhoji, founded the Bishnoi sect in 1485 in the Bikaner desert. He laid down twenty nine rules of conduct, and the name Bishnoi comes from bis, twenty, and noi, nine. Among the rules are a ban on cutting green trees, a ban on killing animals, the filtering of drinking water and a vegetarian diet, which together turned a religious order into a conservation code that still shields the blackbuck, the chinkara and the khejri in western Rajasthan.

Option B and option C are wrong because Pipa and Dhanna were Bhakti saints of Rajasthan with no such ecological code. Option D names Jasnath Ji, founder of the Jasnathi sect of the same desert, often used as a distractor in state papers because the two sects are contemporaries.