The effective resistance of a number of resistors in parallel is `x Omega`. When one of the resistors is burnt, the effective resistance is `y Omega`. The resistance of the burnt resistor is.

Options

A. `((xy)/(x+y))Omega`
B. `(x-y)Omega`
C. `((x+y)/(xy))Omega`
D. `((xy)/(y-x))Omega`

Answer

D