This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
Wof is the most likely explanation for multiple drug resistance to antibiotics that spreads from one type of bacteria to another 
Select and explain. 
A. Adaptation, B. Gene transfer, C. Mutation, D. Decreased bioavailability
B: Gene transfer
Answer: B: Gene transfer 
Explanation: Gene transfer (infectious resistance) The resistance causing gene is passed from one organism to the other; is called horizontal transfer of resistance. Rapid spread of resistance can occur by this mechanism and high level resistance to several antibiotics (multidrug resistance) can be acquired concurrently. Ref :- kd tripathi; pg num:-692