As of January 2020, _____ has the maximum number of seats in the Rajya Sabha.

Uttar Pradesh

The correct answer is Option 3 - Uttar Pradesh

As of January 2020, Uttar Pradesh had the maximum number of seats in the Rajya Sabha.

Even though the maximum strength of the Rajya Sabha can be 250 members, each state gets allocated a specific number of seats based on its population. Uttar Pradesh, being the most populous state in India at the time (and currently), had the highest number of seats (31) in the Rajya Sabha.

As of January 2020, Uttar Pradesh also had the maximum number of seats in the Lok Sabha too.
Uttar Pradesh gets the highest number of seats (80) in the Lok Sabha as well.