An organism which has acquired a heritable variation as a result of sudden change in the hereditary material is called as a

Answer: Option C

An organism that has acquired a heritable variation as a result of the sudden change in the hereditary material is called a Mutant.
A mutant is an organism or a new genetic character arising or resulting from an instance of mutation, which is generally an alteration of the DNA sequence of the genome or chromosome of an organism.
The natural occurrence of genetic mutations is integral to the process of evolution.