Q: Which one of the following is not a nitrogen fertilizer?
(a)(NH₄)₂SO₄
(b)NH₄NO₃
(c)N₂
(d)(NH₂)₂CO
Correct Answer: (c)
The correct answer is (c): N2. Subject: General Studies | Sub-topic: Miscellaneous Note: This answer was determined through AI-based research. Verify against the official answer key when available.