question: For post exposure prophylaxis for HIV the regimen is ?
opa: Zidovodin + lamivudin for 4 weeks
opb: Lamivudin + ritonavir for 4 weeks
opc: Zidovudin + lamivudin + Indinavir for 4 weeks
opd: Single dose zidovudin + lamivudin + Indinavir