Four girls, Monika, Preeti, Abha and Raji, and three boys, Harsh, Punit and Sushant, are sitting in a row facing north such that no two girls are neighbours.

Monika is to the immediate left of Harsh but is not adjacent to Sushant. Abha is to the immediate right of Punit but is not sitting at one of the ends. Harsh and Punit are the neighbours of Raji.

Who is sitting at the extreme right end?