Step 1: Municipal Corporation in Bihar.
In Bihar, a municipal corporation can have a maximum of 75 wards. This is in accordance with the state's municipal laws and regulations.
Step 2: Analysis of options.
- (A) 37: A municipal corporation in Bihar can have more than 37 wards.
- (B) 51: The number of wards is greater than 51.
- (C) 72: This is not the maximum allowed in Bihar.
- (D) 75: This is the correct maximum number of wards for a municipal corporation in Bihar.
Step 3: Conclusion.
The maximum number of wards a municipal corporation can have in Bihar is 75, so the correct answer is (D) 75.