PATHOLOGY

Detailed explanation-1: -(D) Killer T-cells – They are a part of acquired immunity. They are involved in the body’s third line of defence. And, hence they are not a part of non-specific defence.

Detailed explanation-2: -Which of the following is not an example of nonspecific (innate) immunity? specific immunity.

Detailed explanation-3: -Innate, or nonspecific, immunity is the defense system with which you were born. It protects you against all antigens. Innate immunity involves barriers that keep harmful materials from entering your body. These barriers form the first line of defense in the immune response.

Detailed explanation-4: -Answer and Explanation: Of the following cells, the neutrophils (answer choice D) are the cells involved in nonspecific or innate immunity. The remaining cell types are all involved in the adaptive or specific immunity.