$I.$ Sleep-wake cycle, $II.$ Body temperature, $III.$ Pigmentation, $IV.$ Metabolism, $V.$ Defense capability. All of the above-written activities are influenced/regulated by:

  • A
    Pineal gland
  • B
    Parathyroid gland
  • C
    Thymus gland
  • D
    Adrenal gland

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