A middle aged man presented with pain in back, lack of interest

A middle aged man presented with pain in back, lack of interest i recreational activities, low mood, lethargy, decreased sleep and appetite for two months. There was no history suggestive of delusions of hallucinations. He did not suffer from any chronic medical illness. There was no family history of psytchiatric illness. Routine investigations including haemogram, renal function tests, liver function testsm electrocadiogram did not reveal any abnormality. This patient should be treated with 

1. Haloparidol.

2. Sertraline.

3. Alprazolam.

4. Olanzapine.

Ans 3