One day, Mr. and Mrs. A invited three couples to dinner. They were Mr. and Mrs. B, Mr. and Mrs. C and Mr. and Mrs. D. During the meal, eight of them sat evenly at a round table, and only one couple was separated. It is now known that 1: the person opposite Mrs .A is the man sitting on the left of Mr. B. 2: the person on the left of Mrs. C is sitting opposite Mr. D-- a lady: .3: the man on the right of Mr. D is a woman, and she sits opposite the lady in the second position on the left of Mr. A.
Which couple were separated when arranging seats?
Mr. and Mrs. C