Question

Bone meal is a source of:
(A) Ca
(B) N
(C) P
(D) Mo

• A. (A), (B) and (D) only.
• B. (A), (B) and (C) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Bone meal is especially useful in organic farming for promoting root growth and flower development.

Answer 1

The Correct Option is B

Bone meal is an organic fertilizer primarily rich in calcium (Ca) and phosphorus (P), and to a lesser extent, nitrogen (N). It does not provide molybdenum (Mo).

Answer 2

Elimination approach: Bone meal is produced by grinding animal bones, which are chemically composed mainly of hydroxyapatite, a calcium phosphate mineral, giving a rich supply of both calcium (Ca) and phosphorus (P). The residual organic protein/collagen fraction of bone also contributes a modest amount of nitrogen (N).
Molybdenum (Mo) is a trace metal not associated with bone tissue composition at all, so it can be eliminated immediately.
Since Ca, N and P are all present but Mo is absent, the combination (A), (B) and (C) only is correct.