Guano is a major source of

A. Nitrogen

B. Phosphorus

C. Sulphur

D. Zinc

Answer: Option B

Solution(By Examveda Team)

Guano is a major source of Phosphorus.
Guano is the accumulated excrement of seabirds or bats. Guano is a highly effective fertilizer due to its high content of nitrogen, phosphate, and potassium, all key nutrients essential for plant growth.
It contains plant nutrients including nitrogen, phosphorus, calcium and potassium.