Consider the following statements regarding supercharging of CI engines:1. Supercharging results in a quieter and smoother operation of a CI engine2. Supercharging of a CI engine requires an increase in valve overlap3. The limit of supercharging for a CI engine is reached by thermal and mechanical loadingWhich of the above statements are correct?

Consider the following statements regarding supercharging of CI engine

1.	Consider the following statements regarding supercharging of CI engines:1. Supercharging results in a quieter and smoother operation of a CI engine2. Supercharging of a CI engine requires an increase in valve overlap3. The limit of supercharging for a CI engine is reached by thermal and mechanical loadingWhich of the above statements are correct?
A.	1, 2 and 3
B.	1 and 2 only
C.	1 and 3 only
D.	2 and 3 only
Answer» B. 1 and 2 only