A metallic prong consists of $4$ rods made of the same material, cross-sections and same lengths as shown below. The three forked ends are kept at $100^{\circ} C$ and the handle end is at $0^{\circ} C$. The temperature of the junction is ............. $^{\circ} C$

210540-q

  • [KVPY 2013]
  • A

    $25$

  • B

    $50$

  • C

    $60$

  • D

    $75$

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