CBSE
1-P, 2-Q, 3-P,R, 4-P,R,S
1-P, 2-Q, 3-P,Q, 4-R,S
1-P, 2-P,R,S, 3-S,Q, 4-P,R
1-P, 2-P,Q, 3-Q, 4-P