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
The following neonatal reflex disappears by what age 
Select and explain. 
A. 5 months, B. 6 months, C. 4 months, D. 9 months
B: 6 months
Answer: B: 6 months 
Explanation: This is Asymmetric tonic neck reflex (ATNR) which disappears by 6months



Reflex
Onset
Fully developed
Duration




Palmar grasp


28 weeks of gestation
32 weeks of gestation
2-3 months postnatal




Rooting reflex 


32 weeks of gestation
34 weeks of gestation
Least prominent after 1 month




Moro's reflex


28 -32 weeks of gestation
37 weeks of gestation
5-6 months postnatal




Asymmetric tonic nerve reflex 


35 weeks of gestation
1 month postnatal
6 - 7 months postnatal




Parachute reflex


7 - 8 months postnatal
10 - 11 months postnatal
Remains throughout life.