## Discussion Forum

Que. | If Im denotes the set of integers modulo m, then the following are fields with respect to the operations of addition modulo m and multiplication modulo m:
(i) Z23 (ii) Z29 (iii) Z31 (iv) Z33 |

a. | (i) only |

b. | (i) and (ii) only |

c. | (i), (ii) and (iii) only |

d. | (i), (ii), (iii) and (iv) |

Answer:(i), (ii) and (iii) only |