This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
Multiple drug resistance is spread by - 
Select and explain. 
A. Transformation, B. Transduction, C. Mutation, D. Conjugation
D: Conjugation
Answer: D: Conjugation 
Explanation: Ans. is 'd' i.e., Conjugation Drug resistance | | | Mutation Genetic transfer | | |||||Stepwise mutationOne-step mutationTransformationTransductionConjugation||o Not significant resistanceo Penicillino Transmitted by R factoro Resistance to multiple drugsPenicillinStreptomycin