41.
									
										What is the oxygen effect in radiotherapy? 
									
								
															
														
																									
										A:
											Detrimental effect of oxygen in presence of therapeutic radiations 
									
																										
										B:
											Enhancement effect of oxygen in presence of therapeutic radiation 
									
																										
										C:
											A positive effect of oxygen in absence of therapeutic radiations 
									
																										
										D:
											Presence of oxygen during radiation treatment
									
																								 
							
																
									The answer is:
										B
									
								
														
							
								
								
							
							
							
								