Correct Option (d) excretion of nitrogenous wastes
Explanation:
Enteronephridia is concerned with excretion of nitrogenous waste. In annelids, the nephridia are the excretory organs. In earthworm, three types of nephridia are found (a) septal (b) pharyngeal and (c) lntegumentary.
The septal nephridia do not discharge the excretory fluid to the exterior. Instead, these pour it into the intestine. Hence, these are also called enteronephric nephridia.
