A pure resistive circuit element X when connected to an ac supply of peak voltage 400 V gives a peak current of 5 A which is in phase with the voltage. A second circuit element Y, when connected to the same ac supply also gives the same value of peak current but the current lags behind by `90^(@)`. If the series combination of X and Y is connected to the same suply, what will be the rms value of current?
A. `(10)/(sqrt2)"amp"`
B. `(5)/(sqrt2)"amp"`
C. `(5)/(2)"amp`
D. 5amp
