Which is not possible by mutation?
A) Development of a new variety
B) Regeneration
C) Recombination
D) Disease-resistant plant

Hint: A mutation is a change in the nucleotide sequence of an organism's genome, virus, or extrachromosomal DNA in biology. DNA or RNA can be found in viral genomes. Mutations are induced by errors in DNA or viral replication, mitosis, or meiosis, as well as other types of DNA damage, such as pyrimidine dimers caused by UV radiation, which may then undergo error. -vulnerable to repair.

Complete answer:
Mutations may or may not result in detectable changes in an organism's observable features (phenotype). Evolution, cancer, and the development of the immune system, including junctional variety, are all affected by mutations in both normal and aberrant biological processes. Because mutations can cause harm to genes, organisms have mechanisms in place to avoid or rectify mutations by returning the altered sequence back to its original state, such as DNA repair.

- All genetic variety stems from mutation, which provides the raw material on which evolutionary forces like natural selection can act.
- A mutation is a change in the nucleotide sequence of an organism's genome, virus, or extrachromosomal DNA that is permanent.
- The act of exposing seeds to chemicals or radiation in order to produce mutants with desirable qualities is known as mutation.
- Genetic diversity is increased when a mutation develops and DNA is swapped across chromosomes (recombination).
- Mutations can also be used to create disease-resistant plants.

Therefore the correct answer is option ‘C’.

Note: Many distinct sorts of sequence changes can occur as a result of mutation. Gene mutations can have no effect, change a gene's product, or prohibit a gene from working properly or fully. Non-gene areas can also have mutations.