1.
2.
3.
4.
1.
2.
3.
4. None of these
1. 3 and 4
2. 6 and 7
3. 2 and 3
4. None of these
None of these
1. 1 and 2
2. 2 and 3
3. 6 and 7
4. None of these
6 and 7
1. n+1-b
2. b-n+1
3. b-n-1
4. n-b-1
b-n+1
1. 4
2. 5
3. 6
4. 7
5
1. 4
2. 5
3. 6
4. 7
5
1. 1, 3
2. 5, 1
3. 2, 1
4. 4, 2
2, 1
1. 1
2. 2
3. 3
4. 4
3
1. 5 and 7
2. 4 and 8
3. 5 and 4
4. 4 and 7
5 and 7