my daughter weight is 15 kg at the age of 5 year is she is under weight

A. If it is exact five years than your child is 3 KG underweight as of now so by the age of one year the minimum gain should be about 10 KG be done and every year we expect a minimum gain of two years if it happens that way and that is good for the child to buy the age of five it should be a minimum of 18 KG