Frederick Griffith performed an experiment on Streptococcus pneumoniae, bacteria that causes pneumonia in humans.
He takes two strains of S. pneumoniae, S-strain (smooth strain) secretes a polysaccharide capsule
R-strain (which does not produce a polysaccharide capsule).
He infects the mouse with the strains and gets the following results-
He concluded that something from the dead S-type bacteria transformed the type-R bacteria into S-type bacteria.
Griffith called this process transformation and the unidentified substance causing this transformation was termed the transformation principle.
So, The correct option is C.
The transformation was discovered by Frederick Griffith.