The risk of transmission of Hepatitis B Virus (HBV) is greater than that of Human Immunodeficiency Virus (HIV) because HBV is
1. more resistant than HIV.
2. transmissible through saliva.
3. in higher numbers in blood than HIV.
4. autoclave resistant.

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only

All of the above.