Question

Brake thermal efficiency of the three basic types of reciprocating engines commonly used in road vehicles are given in the increasing order as:                              

      (a) 2 Stroke SI engine, 4 stoke SI engine, 4 stroke CI engine

      (b) 2 Strokes SI engine, 4 stroke CI engine, 4 stroke SI engine

      (c) 4 Stroke SI engine, 2 stroke SI engine, 4 stroke CI engine

      (d) 4 Stroke CI engine, 4 stoke SI engine, 2 stroke SI engine