my baby boy is 3 months old now and his weight is 4.8kg only. is this weight normal according to his age or is he underweight

A. This is looking like a healthy vegan but let me tell you how you should evaluate the weight of the child from the birth weight you should see the child should gain a minimum of 500 g in a month if that’s happening that means your child is gaining in a healthy manner it would be easier for you to evaluate the weight