Answer:
Option (b).
Explanation:
Plasma membrane is also known as cell membrane. This membrane separates the cell interior to its exterior environment. Plasma membrane is made up of lipids and proteins.
Bacterial cells contain peptidoglycan layer and acts as a target for the innate immune system. Innate immune system recognizes the pathogen by the pattern recognition receptors present on the membrane. Hence, plasma membrane plays an important role in the recognition of bacterial cells by the immune system.
Thus, the correct answer is option (b).
