The correct option is D Rs. 5
Here, X paid application money of Rs 5 per share for 100 shares i.e. Rs 500. The shares were issued at Rs 10 per share and Re 1 Premium per share i.e. Rs 11 per share for 100 shares i.e. Rs 1100. X failed to balance call money of Rs 5 per share which means the shares would be forfeited and reissued. In order to balance the balance amount to be paid by X i.e. Rs 500, the maximum discount per share reissued will be Rs 500/100 i.e. Rs 5 per share.