Jika diketahui P = {1, 2, 3, 4}, Q = {3, 4, 5, 8}, dan R =

Jika diketahui P = {1, 2, 3, 4}, Q = {3, 4, 5, 8}, dan R = {4, 5, 6, 7} maka P n Q u R adalah.... A. {} B. {4} C. {3, 4} D. {4, 5, 6}