Explanation:

- Kerala has been known for consistently having a high sex ratio, reflecting its progressive social norms. It topped the 2011 Indian census with a sex ratio of 1084 females for every 1000 males.

- Tamil Nadu, though significantly progressive in several social measures, has a lower sex ratio compared to Kerala.

- Manipur had a lower sex ratio according to the 2011 census, influenced by sociocultural factors.

- Meghalaya also has a relatively high sex ratio, benefiting from its matrilineal traditions, but it is still below that of Kerala.

Kerala is indeed the correct answer.