Three bars of equal lengths x and equal area of cross-section A are connected in series. Their thermal conductivities are in the ratio 2:4:3. If the open ends of the first and the last bars are at temperatures `200^@C` and `18^@C`, respectively in the steady state, calculate the temperatures of both the junctions.

Options

A. `116^@C,74^@C`
B. `120^@C,180^@C`
C. `125^@C,50^@C`
D. `130^@C,40^@C`