Which of the following is true regarding T-ly | vedclass

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(C) $T$-lymphocytes are a type of white blood cell that plays a central role in cell-mediated immunity.They originate in the bone marrow and mature in

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They have three main types: cytotoxic $T$-cells,helper $T$-cells,and suppressor $T$-cells.

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(C) $T$-lymphocytes are a type of white blood cell that plays a central role in cell-mediated immunity.They originate in the bone marrow and mature in the thymus gland.There are three main functional types of $T$-lymphocytes:$1$. Helper $T$-cells $(T_h)$: These activate other immune cells.$2$. Cytotoxic $T$-cells $(T_c)$: These directly kill infected or cancerous cells.$3$. Suppressor $T$-cells $(T_s)$: These regulate the immune response and prevent autoimmunity by suppressing the activity of other immune cells.Therefore,option $C$ is the correct statement.

Column-$I$	Column-$II$
$(a)$ Physical barrier	$(w)$ Saliva
$(b)$ Physiological barrier	$(x)$ Interferons
$(c)$ Cellular barrier	$(y)$ Skin
$(d)$ Cytokine barrier	$(z)$ Monocytes

Which of the following is true regarding $T$-lymphocytes in mammals?

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