Question

Which of the following power plants use heat recovery boilers (unired) for steam generation?    

1. combined cycle power plants.

2. All thermal power plants using coal.

3. Nuclear power plants.

4. Power plants using fluidized bed combustion

Select the correct answer using the codes given below:

(a) 1 and 2                        (b) 3 and 4

(c) 1 and 3                         (d) 2 and 4