A Man Is 24 Years Older Than His Son. In Two Years, His Age Will Be Twice The Age Of His Son. The Present Age Of His Son Is:

Question: A Man Is 24 Years Older Than His Son.  In Two Years, His Age Will Be Twice The Age Of His Son. The Present Age Of His Son Is:
a. 12 years
b. 15 years
c. 18 years
d. 22 years