Pediatrics A 10 year old boy presents with mucosal bleeding of 1 week duration. The investigation of choice that will be most useful in him is – A Prothrombin time B Clotting time C Partial thromboplastin time D Platelet count 💡 Explanation A 10 year old boy presents with mucosal bleeding of 1 week duration. The investigation of choice that will be most useful in him is – ✓ Correct Answer: D. Platelet count