The correct option is C S.C.I.D. and A.I.D.S
Cholera is an infection of the small intestine by some strains of the bacterium Vibrio cholerae. Diphtheria is caused by Corneybacterium diphtheriae that affects the mucous membrane of nose and throat.
Severe combined immunodeficiency or severe mixed immunodeficiency syndrome is a genetic disorder characterized by the disturbed development of functional T cells and B cells. Acquired immunodeficiency syndrome is a spectrum of conditions caused by the infection of HIV which suppresses one's immunity.
Thus, the correct answer is option C.