UPSC NDA II 2023 Mathematics Solved Paper

Let A={1,2,3,...,20}. Define a relation R from A to A by R={(x,y):4x−3y=1}, where x,y∈A. Which of the following statements is/are correct?
1. The domain of R is {1,4,7,10,13,16}.
2. The range of R is {1,5,9,13,17}.
3. The range of R is equal to codomain of R. Select the correct answer using the code given below :