Rankine efficiency would approach carnot cycle efficiency

Question

Direction: Each of the next consists of two statements, one labeled as the ‘Assertion (A)’ and the other as Reason (R). You are to examine these two statement carefully and select the answer to these items using the codes given below:

Codes:

1.  Both A and R are indidually true and R is the correct explanation of A
2. Bothe A and R are individually true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

Assertion (A): Rankine efficiency would approach carnot cycle efficiency by providing a series of regenerative feed heating                    

Reason (R): with regenerative feed heating, expansion, through the turbine approaches an isentropic process.