Question

What is not the function of lymph?
A. Transport RBCs
B. Drain excess tissue fluid
C. Transport lymphocyte and antibodies
D. Transport absorbed fat

Answer 1

Hint: Lymph is a fluid inside the lymph node which contains lymphocytes i.e., white blood cells which strains through the lymphatic system into the bloodstream. It also transports antibodies made by lymphocytes.

Complete answer:
Lymph is a colourless fluid which contains WBCs i.e., white blood cells and this lymph fluid flows through the lymphatic system which circulates through the lymph nodes and the bloodstream. The lymph node is an organ of the lymphatic system and there the lymphocytes make antibodies which go out of the lymph node into circulation, seek and target pathogens.

Let's look at options now.
> Option D: Transport absorbed fat-
Lymph transport absorbs fat but in the question that option is asked which is not the function of lymph and transporting the absorbed fat is the function of lymph. Therefore, this option is incorrect and it gets eliminated.

> Option C: Transport lymphocyte and antibodies-
Lymph transport lymphocytes and antibodies but in the question that option is asked which is not the function of lymph and transporting lymphocytes and antibodies are the function of lymph. Therefore, this option is incorrect and it gets eliminated.

> Option B: Drain excess tissue fluid-
It is also one of the functions of lymph but in the question that option is asked which is not the function of lymph but draining excess tissue fluid is the function of lymph. Therefore, this option is incorrect and it gets eliminated.

> Option A: Transport RBCs-
It is not the function of lymph and in the question that option is asked which is not the function of lymph and lymph does not transport RBCs. Therefore, this option is the correct one.

Hence, the correct answer is option (A).

Note: From all the options given, drain excess tissue fluid, transport lymphocyte and antibodies and transport absorbed fat are the functions of lymph since there is presence of WBCs in lymph but these do not function to transport RBCs. Thus only option A is not the function of lymph and this is what has been asked in the question.