Q.

The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is

• AFour stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine
• BFour stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine
• CFour stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine
• DTwo stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine