In the Vijay-starrer 'Kaavalan', Vadivelu played a character named 'Ammavasai'. This refers to the new moon day in Tamil calendar. The other options (Pournami, Deepavali, Suriyan) are all related to celestial bodies or festivals - Pournami is full moon day, Deepavali is a festival, and Suriyan means sun - making them thematic distractors.