(09年长沙一中一模文)刘、李两家夫妇各带1个小孩一起到公园游玩

09年长沙一中一模文)刘、李两家夫妇各带1个小孩一起到公园游玩,购票后排队依次入园.为安全起见,首尾一定要排两位爸爸,另外,两位小孩一定要排在一起,则这6人的入园顺序排法种数共有(  

 A12              B24            C36             D48

答案

B

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