You're welcome! 
 The eastern part became known as Pakistan, the eastern wing of newly born Pakistan and the western part came to be known as West Bengal, which continued as Indian state. 
 What else can you tell me? 
 Great thank you! 
 What can you tell me about it's etymology?
The eastern part became known as Pakistan, the eastern wing of newly born Pakistan and the western part came to be known as West Bengal, which continued as Indian state.