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Two metallic rods of same area of cross...

Two metallic rods of same area of cross section, having lengths in ratio `2:3` and ratio of thermal conductivities `2:3` are connected in series across a temperature difference as shown in figure. The temperature of the junction `(theta_0) ` is

A

`125°C`

B

`150°C`

C

`160°C`

D

`180°C`

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