Study the following information and answer the question given below.

J, K, L, M, N, O and P are seven kids playing in the garden.  They are wearing clothes of colors Black, Blue, White, Green, Pink, Yellow and Brown.  Out of the seven, three are girls.  No girl is wearing either Black, Yellow or Brown.  M's sister O is wearing Pink. While he is wearing Brown.  J is wearing Blue while his sister K is not wearing Green.  N is wearing Yellow while his best friend P is a boy.

Which is group denoting only girls?

KLO