'കേരളസിംഹം' എന്ന്  വിശേഷിപ്പിക്കപ്പെടുന്നത്   ആരെയാണ്?

Acharya Vinoba Bhave is famous for :

The famous Nalanda University was during the period of :

Travancore ruler who abolished slave trade :

The word Adivasi was used for the first time to refer to the tribal people by