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
Which of the following should arouse concern in a parent in regards to development ___________ 
Select and explain. 
A. Mouthing at 6 months of age, B. Fisting hand at 5 months, C. Drooling of saliva at 9 months, D. Casting objects at 1 year
B: Fisting hand at 5 months
Answer: B: Fisting hand at 5 months 
Explanation: This instinct to grasp is a reflex, and it&;s at its strongest for the first eight weeks of your baby&;s life. This reflex will have gone by the time she is three months. Your baby&;s hands will mostly be clenched in a fist during her first couple of months. Ref : Nelson paediatrics Chapter : Growth and deve