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Consider the following statements pertaining to Room Sensible Heat Ratio (RSHR) line:

1. It is the line drawn on psychrometric chart through the room conditions.

2. Its slope is the ratio of sensible cooling load to room latent heat load.

3. The supply air condition must lie on this line for satisfactory performance.

Which of the statements given above are correct?

A) 1, 2 and 3                     

B) 1 and 2

C) 1 and 3            

D) 2 and 3