Guano deposits of birds consists of

A. Sulphur

B. Oxygen

C. Calcium

D. Phosphorus

Answer: Option D

Solution(By Examveda Team)

Guano deposits of birds consist of Phosphorus.
Seabird guano is the fecal excrement from marine birds and has an organic matter content greater than 40%, is a source of nitrogen (N) and available phosphate (P₂O₅).
Seabird guano contains plant nutrients including nitrogen, phosphorus, calcium and potassium.