This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A 10 year old boy presenting with cubitus a varus deformity and a history of trauma 3 months back on clinical examination, has preserved 3 bony point relationship of the elbow. The most probable diagnosis is? 
Select and explain. 
A. Old unreduced dislocation of elbow, B. Non- union lateral condylar fracture of humerus, C. Malunited intercondylar fracture of humerus, D. Malunited supracondylar fracture of humerus
D: Malunited supracondylar fracture of humerus
Answer: D: Malunited supracondylar fracture of humerus 
Explanation: Cubitus varus deformity and preservation of three point bony relation ours the diagnosis of malunited fracture supracondylar humerus. Ref: Tachdjian's Pediatric Ohopedics 3/e, Page 2130-75, 2060.