## Discussion Forum

Que. | The set {1, 2, 3, 5, 7, 8, 9} under multiplication modulo 10 is not a group. Given below are four plausible reasons. Which one of them is false? |

a. | It is not closed |

b. | 2 does not have an inverse |

c. | 3 does not have an inverse |

d. | 8 does not have an inverse |

Answer:3 does not have an inverse |