A pure resistive circuit element X when connected to an a.c. supply of peak voltage 200V gives a peak current of 5A. A second current element Y when connected to same a.c. supply gives the same value of peak current but the current lags behind by `90^@`. If series combination of X and Y is connected to the same supply, what is the impedance of the circuit.

Options

A. `40sqrt2 Omega`
B. `40 Omega`
C. `80 Omega`
D. `2 sqrt40 Omega`.