Platelet count is markedly decreased in which condition?

Correct option is D

Ans. (d) Dengue fever Sol. Dengue fever is known for causing a significant drop in platelet count, which increases the risk of bleeding and hemorrhagic complications.
Explanation of each option:
· (a) Typhoid fever – Affects GI tract but doesn’t usually reduce platelet count drastically.
· (b) Malarial fever – May reduce platelets mildly but not as severely as dengue.
· (c) Rheumatic fever – Inflammatory disorder; platelet count usually normal.
· (d) Dengue fever – Correct. Characterized by thrombocytopenia (low platelets).