The innermost wall layer of pollen sac is tapetum. Its function is in

A. Protection

B. Nutrition

C. Dehiscence

D. Mechanical strength

Answer: Option B

Solution(By Examveda Team)

The innermost wall layer of the pollen sac is the tapetum. Its function is in Nutrition.
The tapetum is a specialized layer of nutritive cells found within the anther, of flowering plants, where it is located between the sporogenous tissue and the anther wall.
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.