How many of the following pairs are correct regarding the thermal tolerance of organisms?
$(1)$ Aves - eurythermal
$(2)$ Mammals - stenothermal
$(3)$ Amphibia - stenothermal
$(4)$ Reptile - eurythermal

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $3$

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$R$: 'Regulators' can maintain internal homeostasis only up to a limit of stressful conditions.

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