WBJEE 2020 Math Solved Paper

If a – b = 0 then b – a = 0,
if a – b is irrational then b – a is irrational
∴ a ρ b ⇒ b ρ a ⇒ symmetric
∀a∈R, a – a = 0 a ρ a ⇒ reflexive
If a = 2, b = 2 , c = 3, then
a ρ b, b ρ c but a ρ c is not true ⇒ not transitive