A heat engine absorbs heat `Q_(1)` at temperature `T_(1)` and heat `Q_(2)` at temperature `T_(2)`. Work done by the engine is `(Q_(1)+Q_(2))`. This data
A. Violates `I^(st)` law of thermodynamics
B. Violates `I^(st)` law of thermodynamics if `Q_(1)` is -ve
C. Violates `I^(st)` law of thermodynamics if `Q_(2)` is -ve
D. Does not violate `I^(st)` law of thermodynamics