Jika P = {x| 4 <= x < 10, x bilangan asli} dan Q = {x|7 < x

Jika P = {x| 4 <= x < 10, x bilangan asli} dan Q = {x|7 < x < 13,x bilangan cacah} maka =.... A. {8, 9} B. {4, 5, 6,7, 10, 11, 12} C. {4, 5, 6, 7, 8, 9, 10, 11, 12} D. {4, 5, 6,7, 7, 8, 8, 9, 9, 10, 10, 11, 12}