The term immunity refers to - Sri Chaitanya Infinity Learn Best Online Courses for NCERT Solutions, CBSE, ICSE, JEE, NEET, Olympiad and Class 6 to 12

A
the combined actions of all white blood cells
B
events that occur within the lymphatic system
C
general defenses against all microorganisms
D
specific defenses against microbes encountered during an earlier exposure

Solution:

Immunity refers to the body's ability to fight external disease-causing organisms/antigens and, as a result, prevent pathogen invasion. The body uses a variety of immunological responses to protect itself from disease-causing microorganisms.