65.
									
										In scurvy, defective collagen is due to insufficient vitamin C, which: 
									
								
															
														
																									
										A:
											Is ordinarily incorporated into crosslinks between tropocollagen molecules 
									
																										
										B:
											Is usually involved in the hydroxylation of proline residues 
									
																										
										C:
											Inhibits the oxidative degradation of collagen 
									
																										
										D:
											 Is required for the conversion of lysyl residues into aldehydes
									
																								 
							
																
									The answer is:
										B