Option (a) All magazines are novels is a possibility: Here, all novels are books and no book is magazine. So, no novel is magazine and vice versa. So, option (a) does not follow.
Option (b) Some copies are not magazines: Here, there is a possibility that some copies are not magazine. So, option (b) does not follow.
Option (c) Some copies are not book: Here, some copies which are magazines are not books. So, option (c) does follows.
Option (d) All books are novels: Here, there is a possibility that all books are novels. So, option (d) does not follow.
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