Pat Is 21 Years Older Than His Son Patrick

Multiple Choice

Pat is 21 years older than his son Patrick. In 4 years Pat will be twice as old as Patrick. How old are they now?

A) Pat is 33; Patrick is 12
B) Pat is 39; Patrick is 18
C) Pat is 37; Patrick is 16
D) Pat is 38; Patrick is 17
E) Pat is 45; Patrick is 24