Question

Answer 1

c - d - a - c

a - c 

c - d

b - c

Answer 2

11c 12 d 
13a 14c

15a 16 c 

17c 18d

19b 20c

 

Answer 3

11 C

12 D

13 A

14 C

15 A

16 C

17 C

18 D

19 B

20 C