Explanation:

- Option 1: Haryana

- Haryana has a significant population of Scheduled Castes.

- However, it does not have the highest ratio compared to other states listed.

- Option 2: Uttar Pradesh

- Uttar Pradesh has the largest number of Scheduled Castes in India.

- But in terms of ratio, it is not the highest.

- Option 3: Rajasthan

- Rajasthan has a diverse caste distribution.

- But it isn't known for having the highest Scheduled Caste ratio.

- Option 4: Punjab

- Punjab has the highest percentage of Scheduled Castes relative to its total population.

- The state has a prominent representation of Scheduled Castes.