This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and development, Subject name: Pediatrics
Weight of newborn quadruples by _________ 
Select and explain. 
A. 9 months, B. 12 months, C. 2 years, D. 3 years
C: 2 years
Answer: C: 2 years 
Explanation: weight of new born Weight of child in nude or minimal clothing is measured accurately on a lever or electronic type of weighing scale. Spring balances are less accurate. The weighing scale should have a minimum unit of 100g. Child should be placed in middle of pan. Age Weight(kg) Bih. 3 6 months 6 (doubles) 1 yr. 9(triples) 2 yr. 12(quadruples) 3 yr. 15 4 yr. 16 Reference: GHAI essential Paediatrics