barley water

Nope and not necessary. Breast milk is enough or formula milk and water.

Feed baby breast milk or formula up to 6 month old. Nothing else.

No dear. Only BM or FM can be given to babies under 6 months.

3 month old baby just drinks milk. No Water. No barley

No water till 6months or when they start solid food

Nope. Babies below 6 months can only drink milk

Not advisable as baby is still too young

No sweet drinks before 6 months

No. Only breast/formula milk

Not advisable, too young.