...$A$... are structures present in the epidermis of leaves. They regulate process of transpiration and ...$B$... exchange. It is composed of two bean-shaped cells known as ...$C$... cells.

Choose the correct combination of $A , B$ and $C$ from the following options

  • A

    $A-$ Stomata, $B-$ gaseous, $C-$ guard

  • B

    $A-$ Stomata, $B-$ gaseous, $C-$ subsidiary

  • C

    $A-$ Stomata, $B-$ water, $C-$ subsidiary

  • D

    $A-$ Stomata, $B-$ water, $C-$ guard

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