Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used? (A) Vapour locking
(B) Hot starting
(C) Spark plug fouling
(D) All 'a', 'b' & 'c'
(B) Hot starting
(C) Spark plug fouling
(D) All 'a', 'b' & 'c'