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: Pediatrics
Age at which a child can tell gender? 
Select and explain. 
A. 2 years, B. 3 years, C. 4 years, D. 5 years
B: 3 years
Answer: B: 3 years 
Explanation: Milestones at 3 years of age( most of these have been asked in previous years)

Can tell age gender and recall story
Rides tricycle
Stands momentarily on one foot
Makes a tower of 10 cubes; imitates construction of “bridge” of 3 cubes
Copies circle
Imitates cross
Plays simple games (in “parallel” with other children)
Helps in dressing (unbuttons clothing and puts on shoes)
Washes hands