This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology Pa-2 (RNA Virus Pa-1,2 & Miscellaneous Viruses), Subject name: Microbiology
Which is not true about hepatitis B virus - 
Select and explain. 
A. DNA virus, B. Transmitted by faeco-oral route, C. Can be transmitted from mother to child (Perinatal transmission), D. Contains reverse transcriptase
B: Transmitted by faeco-oral route
Answer: B: Transmitted by faeco-oral route 
Explanation: Hepatitis B is not transmitted by feco-oral route . Hepatitis A and Hepatitis E is transmitted by this route. Mode of transmission of Hepatitis viruses: 1. HAV -Feco-oral 2. HBV -Blood (MC), Sexual, Veical 3. HCV -Blood (MC), Sexual (+/-), Veical (+/-) 4. HDV -Blood (MC), Sexual(++), Veical(+) 5. HEV -Feco-oral HBV is the only DNA virus among hepatitis viruses; family Hepadnaviridae. All other hepatitis viruses are single stranded RNA viruses. P gene of HBV is the largest and codes for polymerase (P) protein, having 3 enzymatic activities: (i) DNA polymerase activity, (ii) Reverse transcriptase activity and (iii) RNase H activity.