Option 1: Balaji Baji Rao is suggested to be the most powerful Peshwa. This is probably the correct answer.
Option 2: Baji Rao, the answer provided, is mentioned as the most powerful Peshwa. This could be another correct answer.
Option 3: MadhavaRao is not mentioned as the most powerful Peshwa. This option can be considered incorrect.
Option 4: Balaji Vishwanath might be a powerful Peshwa, but it is not specified whether he is the most powerful. Therefore, this option cannot be considered correct.
The provided answer, option 2, is likely to be accurate, as Baji Rao is commonly regarded as one of the most dominant and influential Peshwas in Maratha history.