问题如下：
Which of the following is not the role of central bank?
选项：
A. It is the only authority to supply money
B. It is the conductor of fiscal and monetary policy
C. It is the lender of last resort.
解释：
B is correct.
Central bank is the conductor of monetary policy, not the fiscal policy.
考点：中央银行
解析：中央银行是货币的供给人，A不入选。
中央银行是最后的贷款人，所以C不入选。
但是中央银行不是财政政策的制定者，所以B选项入选。
财政政策一般是谁来制定呢？谢谢老师