Answer:
The correct answer is option A.
Explanation:
The tonsils are present at the back of the throat. Tonsil is located on the left side and the right side of the throat. The tonsils protect the body against gastrointestinal and respiratory infections.
The tonsils carry B cells, that fight against infections. Tonsils also produce antibodies against streptococcal pneumonia, polio, influenza, and a number of other infections.
Tonsils also have several T- cells, type of white blood cells that kill cells infected with viruses.
Thus, the correct option is A.
