The drug of choice for cold-induced urticaria is

Correct Answer: C

Rationale: Cyproheptadine, an antihistamine with serotonin-blocking properties, is effective in treating cold-induced urticaria.

Correct Answer: D

Rationale: Untreated rheumatoid arthritis can lead to joint deformity, cardiovascular disease, and vision loss due to systemic inflammation.

Correct Answer: A

Rationale: B-Thalassemia results in defective hemoglobin production, leading to microcytosis due to smaller-than-normal red blood cells.

Correct Answer: B

Rationale: Von Willebrand disease affects platelet function rather than count, leading to prolonged bleeding time despite a normal platelet count.

Correct Answer: B

Rationale: Valvular pulmonary stenosis produces a systolic ejection murmur with an ejection click due to turbulent flow across a stenotic pulmonary valve, best heard at the upper left sternal border.