yeah my baby only drinks formula milk..

if baby is on top feed then you can give semisolid to 4-6 months baby.otherwise wait till 6 months if u give breast milk.

Some docs suggest feeding semi-solids starting from 4 and half months if mother feels she has less breast milk. However, exclusive breast feeding till 6 months has many long term term health benefits. Mother's milk has all the nutrients and calories that a baby needs till 6 months. Feeding anything else at this time will cause the baby to lose out on vital nutrition provided by breast milk. So please give your baby breast milk only till 6 months. 

Change the doc as well... Nowdays docs are very progressive and experimental.. My doc too said to give all these things at 5 months but i waited till 6 months or so

no. wait till 6 months. change the doctor. Should know TT bag curd, sour shouldn't be given till 1 year. even honey. Diluted ( 1 milk :3 water) milk can be given after 9th month. Fully mashed rice, carrot, potato, apple, banana, water melon can be started with... but only after 6 months. babies digestive system will be very delicate. Enzymes won't be developed well yet. no salt and no sugar please.