Explanation: The question pertains to a historical figure who became powerful in specific regions of India, namely Bihar and West Bengal. This individual, often a regional ruler or a significant political figure, had a notable influence in these two regions during a particular period in Indian history.
To understand the context, it is essential to delve into the historical background of these regions. Bihar and West Bengal are located in the eastern part of India and have been significant centers of power and culture throughout history. The region has seen the rise and fall of numerous dynasties and empires, each leaving its mark on the political landscape.
In the context of Indian history, regional powers often emerged due to various factors such as geographical advantages, economic prosperity, and political instability in the central regions. The individual in question likely capitalized on these factors to establish and maintain power in Bihar and West Bengal.
Bihar, historically known for its rich cultural and religious heritage, has been a focal point for many empires and kingdoms. The region's strategic location and fertile land made it a desirable area for rulers to control. Similarly, West Bengal, with its access to the Bay of Bengal and the fertile Ganges delta, has been a significant economic and political center.
The individual's power in these regions could have been due to several reasons:
1. **Strategic Location**: Both regions are strategically located, making them important for controlling trade routes and resources.
2. **Economic Prosperity**: The fertile land and access to waterways in both regions contributed to economic prosperity, which could be leveraged to build a strong power base.
3. **Political Instability**: Central political instability often provided opportunities for regional leaders to assert their power and control.
It is important to note that the individual's influence did not extend to other regions such as Maharashtra, which is located in western India. This distinction is crucial in understanding the geographical scope of the individual's power.
In conclusion, the correct answer is (D) Only (A) & (B), as the individual gained significant power in both Bihar and West Bengal, reflecting the historical context and regional dynamics of the time. This understanding is essential for comprehending the political landscape of medieval India and the rise of regional powers.