The correct answer is A. Rs. 2 per share.
The company can reissue the forfeited shares at a price of Rs. 8 per share, but it is not required to do so. The company can reissue the shares at any price, as long as the price is not less than the amount that has already been paid on the shares. In this case, the amount that has already been paid on the shares is Rs. 4 per share, so the company must charge at least Rs. 4 per share for the reissued shares.
Option B is incorrect because the company is not required to charge at least Rs. 1 per share for the reissued shares. The company can charge any price, as long as the price is not less than the amount that has already been paid on the shares.
Option C is incorrect because the company is not required to charge at least Rs. 8 per share for the reissued shares. The company can charge any price, as long as the price is not less than the amount that has already been paid on the shares.
Option D is incorrect because the company is not required to charge at least Rs. 10 per share for the reissued shares. The company can charge any price, as long as the price is not less than the amount that has already been paid on the shares.