Match the following :    Column 1   Column 2 1 C1 and C2 in parallel A [R1 x R2]/[R1+R2] 2 R1 and R2 in parallel B C1 + C2 3 C1 and C2 in series C [C1 x C2]/[C1+C2] 4 R1 and R2 in series D R1 + R2

1:B; 2:A; 3:D; 4:C 1:A; 2:D; 3:C; 4:B 1:B; 2:A; 3:C; 4:D 1:A; 2:B; 3:C; 4:D

1:B; 2:A; 3:C; 4:D

LHS is the combination of capacitor or resistance and RHS is the expression.