参考答案：B

解析：[听力原文]
Which of the following is NOT the hospital’s rule

事实题。虽然护士提到“We don’t allow smoking on the wards under any circumstances”，但从紧接着的后文可以找到“However，if you do need to smoke there are special areas where it’s allowed”，可以判断得出No smoking is allowed on the wards，但不是in the hospital。故本题答案选B)。