Which Cofactors Associated with the Pyruvate Dehydrogenase Complex Are Classified

Multiple Choice

Which cofactors associated with the pyruvate dehydrogenase complex are classified as prosthetic groups? 1) TPP
2) lipoate
3) CoA-SH
4) NAD⁺
5) FAD

A) 1 and 5
B) 1, 2, and 4
C) 1, 2, and 5
D) 3 and 4
E) 4 and 5