What is the full form of LKG / UKG?

L.K.G. full form Lower Kindergarten

U.K.G. full form Upper Kindergarten.

What is the meaning of LKG and UKG?

In Germany meaning Garden for Children. It specifies a babysitter or nursery school for the 3-4 years old children.

Which is first LKG or UKG?

L.K.G. is first as it is Lower and U.K.G. as it stands for Upper.