As my child was born after 8 months and his weight was 2.1kg I want to know to give my child to gain weight and height.

A. Your child is four years and you are only providing the details which child was born in eight months with a certain weight but what is the current weight height health like you have not given any detail from the age of nine months onward we suggest you to give all the family foods plus good proteins both veg and non-veg in the diet which would be helpful