Observe the image showing walls of anther below. The layers in anther are marked A, B and C

Choose the correct options with respect to image.
(a) B has protective function
(b) C has nutritive function
(c) A has protective function.

Anther is generally surrounded by four wall layers - the epidermis, endothecium, middle layers and the tapetum. The outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen. Tapetum provides nourishment to the developing pollen grains.