6. The mode of transmission of hepatitis E is through

A. infected syringes and needles
B. faecally contaminated drinking water
C. sexual intercourse
D. none of these

7. Which of the following viral agents can cause diarrhea?

A. Rotaviruses
B. Norwalk virus
C. Astroviruses
D. All of these

8. The virus(es) which has club-shaped peplomers and infects the respiratory tract is/are

A. Coronavirus ‘
B. Astroviruses
C. Norwalk agent
D. All of these