## Discussion Forum

Que. | Let A be a set with n elements. Let C be a collection of distinct subsets of A such that for any two subsets S1 and S2 in C, either S1 ⊂ S2 or S2⊂ S1. What is the maximum cardinality of C? |

a. | n |

b. | n + 1 |

c. | 2n-1 + 1 |

d. | n! |

Answer:n + 1 |