Explanation


Explanatory Answer

B is a general statement. B will be the first in the sequence.

B states that the body (white blood cells) tackles through two broad attack when a virus barges into the body.

Notice that although “white blood cells” are not explicitly mentioned in C but C talks about how B cells and T cells dish out attacks (in two different forms of attacks, as mentioned in B).

Therefore C follows B.

D ends with “take antibodies” and A talks about how antibodies how they are not the only way to fight an infection.

Therefore, A follows D.

Therefore the sequence is BCDA.

 
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