In the pathway for conversion of phenylalanine to fumarate and acetoacetate,there are two well-known enzyme defects that cause inheritable metabolic diseases.What are the names of these two diseases?

A)homocysteinuria and nonketotic hyperglycinemia
B)phenylketonuria and maple syrup urine disease
C)alkaptonuria and nonketotic hyperglycinemia
D)alkaptonuria and phenylketonuria
E)maple syrup urine disease and homocysteinuria