1
(i) B
(ii) C
(iii) ACD
(iv) CD
(v) D
(vi) C
(vii) AC

2
(i) A
(ii) ABC
(iii) AC

3
(i) AC
(ii) CD

4
(i) AB
(ii) BCD
(iii) ABC

5
(i) A
(ii) BC
(iii) A
(iv) D
(v) C