Answer:
The correct answer is option B.
Explanation:
MHC or The major histocompatibility complex is a series of genes that have information and rise to cell surface proteins required for the adaptive immune system to recognize the pathogen or the foreign molecules, There are three classes of MHC - MHC1, MHC2, and MHC3.
MHC class II generally present only on antigen-presenting cells such as single nuclear phagocytes, dendritic cells, thymic and B cells.
Thus, the correct answer is option B.
The dilatation of blood vessels allowing the passage of fluid, antibodies, and WBCs into theinfected body area is known asvasodilation
The carrying capacity of the environment has remained constant.
Hope this helps!
-Payshence xoxo
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