Which is the commonest fracture in children ?
Some guides have given option c as the answer, which is wrong. Read below :-

"Pediatric distal radius fractures are common. In fact, forearm fractures account 40% of all pediatric fractures and the distal radius and distal ulna are the most common sites within the forearm". — Pediatric orthopedics

From above statement, it seems that option c is the correct answer. But, this is not the case because, though, distal radius is the most common site of fracture, it is not greenstick type of fracture rather it is torus fracture :-

"Most of these distal radius fractures in children are buckle fracture, also called torus fracture". — Pediatric orthopedics

Clavicle is the 2nd most common site of fracture.
Therefore, here the best answer is clavicle
Fracture clavicle
Supracondylar fracture
Green stick fracture of lower end of radius
All of the above