Micrografting is used to produce plants free from

Answer: Option A

Micrografting is used to produce plants free from viruses.
An innovative technique of micrografting was developed by Murashige et al. (1972) for the production of uniform virus-free plants on a commercial scale in a controlled environment.
They grafted a small apical shoot of citrus to the top of a decapitated seedling grown in vitro. Micropropagation can be used to produce disease-free plants. It produces rooted plantlets ready for growth, and saves time for the grower, instead of seeds or cuttings.