The category of congenital diseases includes diseases that are ________.
A. caused by infection
B. caused by a spontaneous mutation of a gene
C. present at birth
D. of an unknown cause
Answer:C
The category of congenital diseases includes diseases that are ________.
A. caused by infection B. caused by a spontaneous mutation of a gene C. present at birth D. of an unknown cause
Explanation: A) Infectious diseases are caused by infection.