This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pediatrics
The likely diagnosis in a child with limb pain and pancytopenia is 
Select and explain. 
A. Aplastic anemia, B. Acute lymphocytic leukemia, C. Rheumatic fever, D. Rheumatoid ahritis
B: Acute lymphocytic leukemia
Answer: B: Acute lymphocytic leukemia 
Explanation: Child with acute lymphocytic leukemia presents with pallor, petechiae, infection(pancytopenia),. Reference: GHAI Essential pediatrics, 8th edition