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: Microbiology
Transfer of some chromosomal material from one bacteria uses - 
Select and explain. 
A. F factor, B. R factor, C. Transfer factor, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a > c > b' i.e., F factor > Transfer factor > R factor The plasmid which is responsible for conjugation is called as transfer factor. The plasmid may be R-factor, which codes for transferrable multiple drug resistance. But, some plasmids have the ability to mobilize the chromosomal genes of bacteria it is called F-factor. The F-factor is a transfer factor which helps in conjugation.