The two ends of a rod of length L and a uniform cross-sectional area are kept at two temperatures `T_1` and `T_2` `(T_1>T_2)`. The rate of heat transfer ,`dQ/dt` through the rod in a steady state is given by:

Options

A. `(dQ)/dt=k(T_1-T_2)/(LA)`
B. `dQ/dt=KLA(T_1-T_2)`
C. `(dQ/dt)=(KA(T_1-T_2))/L`
D. `(dQ)/dt=(k(T_1-T_2))/A`