Administration of mifepristone in the late luteal phase:

Correct Answer: A

Rationale: Step 1: Mifepristone is a progesterone receptor antagonist. Step 2: In the late luteal phase, progesterone levels drop, leading to menstruation. Step 3: By inhibiting progesterone action, mifepristone induces menstruation. Step 4: Therefore, the correct answer is A - induces menstruation. Summary: B is incorrect as mifepristone does not postpone menstruation. C is incorrect as it does not prevent luteolysis but rather triggers it. D is incorrect as mifepristone does not cause decidualization of endometrium.

Correct Answer: A

Rationale: Progesterone administration suppresses menstruation by maintaining the endometrial lining. It inhibits the shedding of the endometrium, postponing the onset of menstruation. Choice B and D are incorrect as progesterone thickens cervical mucus and promotes glandular activity, not watery secretions. Progesterone does not sensitize the uterus to oxytocin (Choice C).

Correct Answer: D

Rationale: The correct answer is D because clomiphene citrate is a medication commonly used to treat both female infertility due to anovular cycles and male infertility due to oligozoospermia. For females, clomiphene citrate helps stimulate ovulation, increasing the chances of conception. In males with oligozoospermia, clomiphene citrate can improve sperm count and motility. Option A is correct as mentioned, and option B is also correct as clomiphene citrate can be used in male infertility cases. Option C, endometriosis, is incorrect as clomiphene citrate is not indicated for this condition.

Correct Answer: D

Rationale: The correct answer is D: Drug interactions. When a patient receives CNS stimulants, it's crucial to educate them about potential drug interactions to prevent adverse effects or reduced efficacy. This information helps ensure the safe and effective use of the medication. Proper storage of drugs (A) is important but not as critical as understanding drug interactions. A low-sodium diet (B) and light to moderate exercises (C) are generally not directly related to CNS stimulant use and are not the most important patient education in this context.

Correct Answer: D

Rationale: The correct answer is D, Estrogen antagonists to treat breast cancer. Estrogen antagonists, such as tamoxifen, are used in the treatment of hormone receptor-positive breast cancer by blocking the effects of estrogen on cancer cells. Thyroxine (A) is used to treat hypothyroidism, not thyroid cancer. ACTH (B) is a hormone produced by the pituitary gland and is not used to treat adrenal carcinoma. Choice C is blank, so it is not a valid option. Estrogen antagonists are specifically designed to target hormone-driven breast cancer cells, making them an effective treatment option.