Tuberculosis is a disease which spreads by contact.

Answer: Option D

One word substitute is Contagious.

Infectious: (of a disease or disease-causing organism) liable to be transmitted to people, organisms, etc. through the environment.
Contiguous: sharing a common border; touching.
Fatal: causing death.
Contagious: (of a disease) spread from one person or organism to another, typically by direct contact.