If in winter season the surface temperature of lake is $1^{\circ} C$, the temperature at the bottom of lake will be ............

  • A

    $1^{\circ} C$

  • B

    $0^{\circ} C$

  • C

    $4^{\circ} C$

  • D

    All values less than $1^{\circ} C$ are possible

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