The contraceptive which causes cervical mucus thickness and stops the release of ovum from the ovary is:

Correct option is A

Mala D is a combined oral contraceptive pill that contains both estrogen and progestin. It prevents pregnancy by inhibiting ovulation, thickening cervical mucus to block sperm entry, and altering the endometrial lining to prevent implantation. It is taken daily and is a popular method under India's national family planning program.
Explanation of options: (a) Mala D – This is the correct answer. It works hormonally to prevent ovulation and alters cervical mucus and endometrium. (b) Copper T – A non-hormonal intrauterine device (IUD) that works by releasing copper ions toxic to sperm; it does not affect ovulation or mucus. (c) Lippes Loop – Another IUD that prevents implantation mechanically, not by hormonal suppression of ovulation or mucus thickening. (d) Diaphragm – A barrier method placed in the vagina to prevent sperm from entering the uterus, but it does not influence ovulation or cervical mucus.