Which of the following would best indicate that India has moved away from a colonial institutional legacy rather than merely changing everyday habits?

Replacing the legal system with an entirely new judicial framework

The correct answer is Option 3: Replacing the legal system with an entirely new judicial framework.

Introducing a new dress code in schools: Changing the dress code only affects a cultural practice. It does not alter the institutions that were established on the British model. Therefore, this option is incorrect.

Changing the side of the road on which vehicles are driven: Driving on the left is a continuing colonial practice, but it is an everyday convention rather than an institution. Hence, changing it would not be the strongest evidence of moving away from a colonial institutional legacy.

Replacing the legal system with an entirely new judicial framework: The legal system is specifically identified as one of the institutions built on the British model. Replacing it with a completely new judicial framework would directly weaken a major colonial institutional legacy. Therefore, this is the correct answer.