The coefficient of self inductance of a coil is

If the magnetic flux linked with a coil through which a current of xA is set up, is y Wb, then the coefficient of self-inductance of the coil is :

The self inductance of a coil is

(A): When number of turns in a coil doubled, coefficient of self inductance of the coil becomes four times. (R): Coefficient of self inductance is proportional to the square of number of turns.