NO.PZ2018062006000004
问题如下：
Which of the following concepts regarding bonds is inappropriate?
选项：
A.Indenture is the legal contract about the form of the bond, the obligations of the issuer and the rights of the bondholders.
B.Covenant is the provision that may be used to reduce the credit risk of the bond.
C.Debentures are usually secured bonds, with no collateral backing assigned to the bondholders.
解释：
C is correct.
Debentures are usually unsecured bonds, with no collateral backing assigned to the bondholders.
考点：Basic Features of a Bond
解析：A选项indenture是债务合同，规定了双方的权利和义务，正确。
B选项covenant是合同中的条款，写在indenture中用来降低信用风险，正确。
C选项debenture指的是无担保债券，而非担保债券，选项C说法不正确，当选。
前半句和后半句两个意思
