my baby 3 month 21 days old, he is on mix feeding. his birth weight is 3.5 kg. now his weight is 6 kg and height is 63 cm,, is it normal or under weight ?!

A. No of course if you look at it your child has almost doubled the birth weight and your child is gaining healthy weight gain the height is good so there is no problem that I can see into this your child is having a proper growth as per age of your child