Explanation:

3rd option is correct. Uttar Pradesh has 31 members.
Bihar- 16
Andhra Pradesh- 18 before separation from Telangana
West Bengal- 16
The representatives of states in the Rajya Sabha are elected by the elected members of state legislative assemblies. The election is held in accordance with the system of proportional representation by means of the single transferable vote. The seats are allotted to the states in the Rajya Sabha on the basis of population.