1. CD only.
2. BA only
3. CD and BA
4. DB and CA
DB and CA
1. AD
2. DC
3. CB
4. DA
AD
1. AB only
2. DC only
3. CD only
4. AB and CD
AB and CD
1. C and D
2. B and C
3. A only
4. C only
C and D
1. C only
2. B only
3. A and D
4. B and C
B only
1. D only
2. C only
3. A Only
4. B and C
C only
1. A and B.
2. C and D
3. A only
4. B only
A and B.
1. A only
2. B only
3. C only
4. D only
C only
1. A only
2. B only
3. C only
4. D only
C only
1. A only
2. B only
3. B and C
4. D only
B only