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 feed) presented to pediatric OPD with history of crying on touch. Cause may be: 
Select and explain. 
A. Scurvy, B. Rickets, C. JRA, D. Caffey's disease
A: Scurvy
Answer: A: Scurvy 
Explanation: Scurvy (Barlow's Disease)--> caused due to the def. of Vit.C, especially in children fed predominantly with heat-treated cow's milk. CLINICAL FEATURES- Gum bleeding Petechiae Irritability Subperiosteal hemorrhage involving long bones- Painful pseudo paralysis , Crying on touch OTHER OPTIONS: Caffey's disease--> bone changes, soft-tissue swelling, and irritability JRA--> joint inflammation & stiffness