This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which of the following statements regarding live vaccines is false? 
Select and explain. 
A. Two live vaccines cannot be administered simultaneously, B. Booster doses are not required when live vaccines are administered, C. Single dose gives life long immunity, D. Live vaccine contains both major and minor antigens
A: Two live vaccines cannot be administered simultaneously
Answer: A: Two live vaccines cannot be administered simultaneously 
Explanation: When the administration of two live vaccines is mandatory, it can be given simultaneously but either: ? at different sites of injection or ? at an interval of at least 3 weeks Ref: Park's Textbook of Preventive and Social Medicine By K. Park, 19th Edition, Page 97; Immunology for The Health Sciences By Nicholas J. Vardaxis, Pages 101-4