This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Pubey, Subject name: Pediatrics
Delayed pubey is when primary amenorrhea is seen without development of secondary sexual characters beyond the age of? 
Select and explain. 
A. 12 years, B. 14 years, C. 16 years, D. 18 years
C: 16 years
Answer: C: 16 years 
Explanation: Delayed pubey: Girls: Absence of secondary sexual characters by 13 yrs of age / Absence of menarche by 16 years of age / within 5 yrs of onset of pubey Boys: Lack of pubeal changes by 14 yrs of age