Garia Puja is performed in the month of-

Garia Puja is a very important festival in Tripura celebrated by the tribal communities.

It's a harvest festival linked to the agricultural cycle.

Baisakh (which usually falls in April-May) is the month when Garia Puja is traditionally performed.

The other options are incorrect because:

Chaitra (usually March-April) is just *before* Baisakh, and not when Garia Puja happens.
Magha (usually January-February) is much earlier in the year, so it is not related to Garia Puja time.

So, remember Garia Puja = Baisakh month!