S1·E162 Arnav gives his nod

Arnav informs Khushi that he cancelled the Sangeet because he doesn't like the loud noise. In return, Khushi and the entire family start talking in sign language. Arnav, then, assumes that Anjali skips her lunch because she is sad about the Sangeeth being cancelled. He goes to her room and sees her having her lunch. How will he react?