A heat engine absorbs heat `Q_(1)` at temperature `T_(1)` and `Q_(2)` at temperature `T_(2)` . Work done by the engine is `(Q_(1)+Q_(2))` . This data:
A. violates `1st` law of thermodynamics
B. violates `1st` law of thermodynamics if `Q_(1)` is negative
C. violates `1st` law of thermodynamics if `Q_(2)` is negative
D. does not violates first law of thermodynamics