Choose the correct answer from the given four options. Let us def… - Vidyadip

MCQ

Choose the correct answer from the given four options.
Let us define a relation R in R as aRb if a ≥ b. Then R is:

A
An equivalence relation.
✓
Reflexive, transitive but not symmetric.
C
Symmetric, transitive but not reflexive.
D
Neither transitive nor reflexive but symmetric.

✓

Answer

Correct option: B.

Reflexive, transitive but not symmetric.

We are given that, aRb if a ≥ b

⇒ aRa ⇒ a ≥ a which is true.

For relation aRb to be symmetric, we must have a ≥ b and b ≥ a which can’t be possible.

Hence, R is not symmetric.

For relation aRb to be transitive, we must have aRb and bRc.

⇒ a ≥ b and b ≥ c

⇒ a ≥ c

Hence, R is transitive.

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