Prarthana Sai Narasimhan presented a refreshing array of ragas and rare kritis at Arkay Convention Centre’s 12th anniversary series. She went for a detailed niraval on ‘Ajendra poojitha vigneswaram’ and followed it up with an exhaustive swara segment, the final section of which centered on daivatam. Pallavi composed by Sai Narasimhan, ‘Karunai deivame karpagame kana vendum un porpadame’, set in …