Resistances `R_(1)` and `R_(2)` are joined in parallel and a current is passed so that the amount of heat liberated is `H_(1)` and `H_(2)` respectively. The ratio `(H_(1))/(H_(2))` has the value
A. `(R_(2))/(R_(1))`
B. `(R_(1))/(R_(2))`
C. `(R_(1)^(2))/(R_(2)^(2))`
D. `(R_(2)^(2))/(R_(1)^(2))`