After a blood or OPIM exposure, treatment for ___________ should begin within ___________; treatment for __________ should begin within ________.
a. HIV, 2 hours; Hepatitis B, 24 hours
b. Hepatitis C, 2 hours; Rabies, 24 hours
c. HIV, 24 hours; Tuberculosis, 48 hours
d. Hepatitis B, 2 hours; Tetanus, 24 hours