Progesterone is secreted by:

Correct Answer: D

Rationale: Progesterone is a hormone essential for pregnancy and menstrual cycle regulation. It is primarily secreted by the corpus luteum after ovulation. Ovarian follicles also produce progesterone during the menstrual cycle. Additionally, granulosa and theca cells in the ovaries contribute to progesterone production. Therefore, the correct answer is D, "All of the above," as all three options play a role in progesterone secretion. Choices A, B, and C individually are incorrect as they only represent specific sources of progesterone production.

Correct Answer: C

Rationale: Interferon alpha is indicated in Kaposi's sarcoma due to its antiviral and anti-tumor properties. It helps in controlling the progression of the disease caused by human herpesvirus 8. Other options (A) Rh sensitization is managed by Rh immunoglobulin, (B) Rheumatoid arthritis is treated with disease-modifying anti-rheumatic drugs, and (D) Chronic granulomatous disease is managed with antibiotics and interferon-gamma.

Correct Answer: B

Rationale: Step 1: Taurine is a vitamin-like compound as it is an amino acid that has functions similar to vitamins in the body. Step 2: Ascorbic acid (Vitamin C) is a vitamin, not a vitamin-like compound. Step 3: Thiamine (Vitamin B1) and Riboflavin (Vitamin B2) are both vitamins, not vitamin-like compounds. Summary: Taurine is the correct answer as it is an amino acid with functions similar to vitamins, while the other choices are known vitamins.

Correct Answer: A

Rationale: Step-by-step rationale: 1. HMG-CoA reductase inhibitors like statins can cause muscle breakdown. 2. Cyclosporine is known to increase the risk of muscle breakdown when used with statins. 3. Thus, the statement that HMG-CoA reductase inhibiting drugs can cause muscle breakdown, especially when used with cyclosporine, is TRUE. Summary: Choice A is correct because it aligns with the known pharmacological interactions between HMG-CoA reductase inhibitors and cyclosporine. Choices B, C, and D are incorrect as they do not accurately reflect the specific relationship between these drugs and muscle breakdown.

Correct Answer: B

Rationale: Step-by-step rationale: 1. Dihydrotachysterol is a form of vitamin D used to treat hypoparathyroidism. 2. Anorexia is a common unwanted effect due to increased calcium absorption causing decreased appetite. 3. Tetany is incorrect as vitamin D helps maintain calcium levels to prevent tetany. 4. CNS toxicity is incorrect as dihydrotachysterol does not typically affect the central nervous system. 5. Lymphocytopenia is incorrect as it is not a known side effect of dihydrotachysterol. Summary: The correct answer is B because anorexia is a common unwanted effect of dihydrotachysterol due to increased calcium absorption, while the other choices are incorrect as they do not align with the mechanism of action or known side effects of this medication.