Parasitic infections generally infect the
a. skin and lungs
b. intestines and skin
c. lungs and intestines
d. blood and intestines

B

Explanation:

Parasitic infection are diseases cause by parasites. Parasites are disease causing organisms that depend on their hosts for survival.They mostly enter the system of their host through the mouth and the skin leading to intestines and the skin infections.

While it infest a human system , it grows , multiply and invade the system , consequently leading  to deficiency and malfunctioning of the system and the host begin to manifest symptoms of diseases as the case may be.