Why Bengali are called mixed origin- Explain with your logic

Bengali is human inhabiting oldest group of this region a mixed race and they lived at Bengal.

Explanation:

This people population is divide between by the Bangladesh and Indian states of west Bengal and Assam valley,this people language in Aryan language.

They have four major religious :- Bengali Hindu, Bengali Muslim, Bengali Christians and Bengali Buddhist.

Bengali used to refer the cultural family  origins from the Bengal, exact origin is known to the Bengali civilization is Bengal region believe the sings of settlement in the region.

Bengal effective the political and power was transferred from the company began under the Bengal presidency,Bengal is refers to the reform during the around of Calcutta.

Bengal as having  started by the  reformer  and Asia first Nobel winner Tagore , Bengal is major role played in the Indian Independence moment  as were dominant.

The first partition divide the Bengal 1905 region in into two provinces for development and administrative purpose.  

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate