Six friends Astha, Bina, Chetna, Devika, Eshita and Falguni are sitting in a row facing towards North. Chetna is not sitting beside Devika who is sitting on the extreme right. Eshita is between Astha and Chetna. Astha is not sitting beside Falguni and Devika. Bina is between Falguni and Devika. Who is the immediate right of Astha?