don't know abt multi v. but vit D is essential as it makes babies bones stronger. sunlight is a good source but toddlers can't tolerate the direct sunlight. . it may lead to sunburn so the vit D is given.

vit d3 should be given till 1 yr of age

to fulfill body requirement

I have given Vit D for only 3 <u>months</u>

Till 1 yr of age.