The correct answer is option 4. The statement mentioned in option 4 is not one of the common failures of the Marathas and the Mughals. The Marathas and the Mughals both had similar failures and weaknesses in terms of their administration, revenue system, economic development, and support for science and technology.

Option 1 states that the Maratha Chiefs were similar to the later Mughal nobles and lacked discipline and a strong sense of unity. This weakness in leadership and organization was a common failure for both the Marathas and the Mughals.

Option 2 mentions that both the Marathas and the Mughals failed to develop a new economy and did not encourage advancements in science and technology. This lack of focus on modernization and development was a shared failure for both empires.

Option 3 states that the revenue system of the Marathas was similar to that of the Mughals, which involved extracting revenues from the peasantry who had limited means to resist. This exploitation of the helpless peasantry was a common failure for both the Marathas and the Mughals.

Therefore, the correct answer is option 4, as it does not align with the common failures and weaknesses of both the Marathas and