To address the question appropriately, we need to identify the region associated with Bipin Chandra Pal, one of India's prominent freedom fighters. The question provides a parallel: "Bal Gangadhar Tilak: Maharashtra; Bipin Chandra Pal: ____________" with options including Punjab, Bihar, Bengal, and Delhi.
Bipin Chandra Pal was a notable leader in the Indian independence movement, known for his advocacy of the Swadeshi movement and part of the famous Lal-Bal-Pal trio (Lala Lajpat Rai, Bal Gangadhar Tilak, Bipin Chandra Pal).
Let's analyze the options:
Hence, the correct answer is that Bipin Chandra Pal is associated with Bengal.
Conclusion: The correct option to fill in the blank is Bengal.