The following information has been extracted from the balance sheet of ABC Corporation as on December 31, 2019.

Total stockholders' equity: $25,000,000

Preferred stock (issued and outstanding): $5,000,000

Average No. of shares of common stock outstanding: 2,000,000 shares

On the basis of above information, the book value per share of common stock is

. Single choice.

a $15.00

b $10.00

c $ 2.5

d $12.5