Do you have any fashion magazines?-Yes I have a lot and are bought by my older sis

问题补充：

--- Do you have any fashion magazines?

---Yes, I have a lot and are bought by my older sisters.

A. most of which

B. most of them

C. most of that

D. most of whom

答案：

A. most of which

(答案→)B. most of them

C. most of that

D. most of whom

解析：句意：--你有一些时尚杂志吗？--有，我有许多本，不过大部分都是我的姐姐买的。因为整个句子已经有连词and，所以不需要用连词了，故排除ACD，这里用代词them代替fashion magazines，故选B。