Which sage or scholar had recast the original single Veda into four distinct Vedas?

'Ayurveda' has its origin in

A. Rig Veda

B. Sama Veda

C. Yajur Veda

D. Atharva Veda

Two popular Assemblies of the Vedic period were

A. Sabha and Mahasabha

B. Mahasabha and Ganasabha

C. Sabha and Samiti

D. Ur and Kula

The Rigvedic Aryans were governed by a

A. Tribal republic

B. Form of democracy

C. Monarchical government

D. Rule by elders

In the early Vedic-period, Varna system was based on

A. Education

B. Birth

C. Occupation

D. Talent