30.
									
										Phenylketonuria (PKU) is inherited disease that is characterized by
									
								
															
														
																									
										A:
											Elimination of gentisic acid in urine 
									
																										
										B:
											Increased occurrence of phenylalanine in blood and tissues 
									
																										
										C:
											Elimination of sugar in urine 
									
																										
										D:
											Decrease in phenylalanine in blood and tissues
									
																								 
							
																
									The answer is:
										B