Eight persons B1, B2, B3, B4, B5, B6, B7 and B8 are sitting in a row facing north. Each of them likes Rasgulla, Dhokla, Kheer, Ras Malai, Halwa, Jalebi, Gulab…

Twelve persons are sitting in two parallel rows in such a way that person sitting one row faces person sitting in the other row. A, B, C, E, F and…