which brand's vitamin d3 drops should I give to my 4 month old baby girl?! what is the dosage level? I'm giving only zincovit since her birth. recently someone suggested to give d3 drops. please help

A. the baby is 4 months of age generally there is no need to give any vitamin supplements to the baby including vitamin D and less baby is having division si mother's milk will meet the requirements exposure to sunlight will sufficient