Sets, Relations and Functions: JEE Main 2018 Mathematics question

Let N denote the set of all natural numbers. Define two binary relations on N as _R = {(x, y) $\in$ N $\times$ N : 2x + y = 10} and R₂ = {(x, y) $\in$ N $\times$ N : x + 2y = 10}. Then :