Two rods of same length and area of cross-section `A_(1)" and" A_(2)` have their ends at the same temperature. If `K_(1) "and" K_(2)` are their thermal conductivities, `c_(1) "and" c_(2)` are their specific heats and `d_(1) "and "d_(2)` are their densities, then the rate of flow of heat is the same in both the rods if

Options

A. `(A_(1))/(A_(2))=(-k_(1))/(k_(2))`
B. `(A_(1))/(A_(2))=(k_(1)c_(1)d_(1))/(k_(2)c_(2)d_(2))`
C. `(A_(1))/(A_(2))=(k_(2)c_(1)d_(1))/(c_(2)d_(2)k_(1))`
D. `(A_(1))/(A_(2))=(k_(2))/(k_(1))`