This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
A 15-year-old boy presented with 1 day history of bleeding gums, subconjunctival bleed and purpuric rash. Investigations revealed: Hb 6.4 gm/dL; TLC-26,500/mm3; prothrombin time-20 sec with a control of 13 sec; partial thromboplastin time-50 sec; and fibrinogen 10 mg/dL. Peripheral smear was suggestive of acute myeloblastic leukemia. Which of the following is the most likely? 
Select and explain. 
A. Myeloblastic leukemia without maturation, B. Myeloblastic leukemia with maturation, C. Promyelocytic leukemia, D. Myelomonocytic leukemia
C: Promyelocytic leukemia
Answer: C: Promyelocytic leukemia 
Explanation: c. Promyelocytic leukemia(Ref: Nelson's 20/e p 2442-2443, Ghai 8/e p 605-607)This patient has complaints of bleeding along with thrombocytopenia, decreased fibrinogen & increased PT & APTT. This is consistent with DIC; DIC is most commonly seen with M3 AML