1. 1,2 and 3 are correct
2. 2 and 3 are correct
3. 1 and 2 are correct
4. 1 and 3 are correct
1 and 3 are correct
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
3. [-1]
4. [3]
[-1]
1.
2.
3.
4.
1.
2.
3.
4.
1.
2.
3.
4.