## Discussion Forum

Que. | Let R be a relation on the set of ordered pairs of positive integers such that ((p, q), (r, s)) ∈ R if and only if p–s = q–r. Which one of the following is true about R? |

a. | Both reflexive and symmetric |

b. | Reflexive but not symmetric |

c. | Not reflexive but symmetric |

d. | Neither reflexive nor symmetric |

Answer:Not reflexive but symmetric |