This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
Bacterial transduction occurs by: 
Select and explain. 
A. Plasmids, B. Sex pili, C. Bacteriophage, D. Uptake of genetic material by other bacteria.
C: Bacteriophage
Answer: C: Bacteriophage 
Explanation: Transduction - Transduction is defined as transmission of a poion of DNA from one bacterium to another by a bacteriophage.