The immune system plays an important role in:
$a$ . Recognition of foreign antigens
$b$ . Responds to antigens and remembers them
$c$ . Allergic reactions
$d$ . Auto-immune diseases
$e$ . Organ transplantation

b, c

and

e

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a

and

b

only

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a, b, c

and

d

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a, b, c, d

and

e

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Solution

The correct option is D $a, b, c, d$ and $e$
The immune system plays an important role in providing immunity to our body against any foreign particles which enters into our body. Thus, it plays an important role in:
$a$ . Recognition of foreign antigens
$b$ . Responds to antigens and remembers them
$c$ . Allergic reactions
$d$ . Auto–immune diseases
$e$ . Organ transplantation
So, the correct option is (d).

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