This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Scurvy, Subject name: Pediatrics
A 5 month-old-baby (exclusively cow milk fed) presented to pediatrics OPD with history of crying on touch. Cause may be: 
Select and explain. 
A. Scurvy, B. Rickets, C. JRA, D. Osteogenesis imperfecta
A: Scurvy
Answer: A: Scurvy 
Explanation: Deficiency of Vitamin C Sub periosteal hemorrhage involving long bones- crying on touch