Virus free plants can be formed by

detailed solution

Correct option is A

Virus free plants can be formed by meristem culture. The reason behind this is that virus cannot propagate in rapidly dividing cells, so meristematic zones of plant always remain virus free.Protoplast fusion technique is used for making somatic hybrids.Somatic cell culture technique is used to propagate plants from somatic cells using nutrient medium and combination of hormones.Callus culture is undifferentiated mass of tissue. Growing callus from plant organs is called callus culture.