Q: Which one of the following acids is secreted by leaves of Nettle that causes painful stings?
(a)Methanoic acid
(b)Citric acid
(c)Tartaric acid
(d)Acetic acid
Correct Answer: (a)
The correct answer is (b) 'सिट्रिक अम्ल'. This question from the General Studies domain tests knowledge of Miscellaneous.