Explanation:

Rajya sabha is called the counsel of the states or upper house of the Indian parliament. Article 80 of the Constitution lays down the maximum strength of Rajya Sabha as 250, out of which 12 members are nominated by the President and 238 are representatives of the States and of the two Union Territories. The allocation of seats is made on the basis of the population of each State. Among them Uttar Pradesh has the largest number of Rajya Sabha seats i.e. 31. Hence option 2nd is correct.