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The coefficients of thermal conductivity...

The coefficients of thermal conductivity of copper, mercury and glass are respectively `K_c, K_m` and `K_g` such that `K_c > K_m> K_g`. If the same quantity of heat is to flow per second per unit area of each and corresponding temperature gradients are `(T_g)_c, (T_g)_m` and `(T_g)_g` then

A

`(T_g)_c= (T_g)_m = (T_g)_g`

B

`(T_g)_cgt(T_g)_mgt (T_g)_g`

C

`(T_g)_clt(T_g)_mlt (T_g)_g`

D

`(T_g)_mlt(T_g)_clt (T_g)_g`

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