Spermicidal jelly acts through :

Ans. is d i.e Disruption of cell membrane Spermicides : "Spermicides are contraceptive chemical agents. They comprise,of a chemical capable of destroying sperm, incororated into an ine base. The commonly used spermicidal agents contgain nonionic surfactants which alter sperm surface membrane permeability, causing osmotic changes resulting in killing of sperm. Most of the spermicides contain nonoxynol-9 which is the best for this purpose."