IS Brushing of Teeth in Night is Compulsory?

Many of us in India Brush our teeths in the morning, is it not compulsory to brush before sleep.

And Which is the best tooth paste and brush in India - Colgate, Pepsodent, RCM Tooth Paste, Amway Glitter Tooth paste or any other, I want to know more about tooth paste and brushes available in India Which are best to use to keep our teeth clean and strong.