True about hepatitis with HCV is:

Genotyping is helpful for predicting the likelihood of response and duration of treatment. Patients with genotypes 1 and 4 are generally treated for 12 months, whereas 6 months of treatment is sufficient for other genotypes. Genotyping can be performed by direct sequence analysis, reverse hybridization to genotype-specific oligonucleotide probes, or restriction fragment length polymorphisms(RFLPs).