Question

What is the appropriate definition of Mutation?

Answer 1

In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
                                                            or
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. 

Answer 2

Hii Swarnava1 !!
Here's Your answer...

In biology, it is a process in which the GENETIC material of a person, a plant or an animal changes in stucture when it is a passed on to children, etc. causing different physical characteristics to develop , a change of this kind.

OR

A change in the form or structure of something.

hope it helps u :))