For a singly reinforced over-reinforced section
1. the lever arm will be less than for a balanced section,
2. the maximum stress developed in concrete would be equal to the allowable stress,
3. the maximum stress developed in steel would be equal to the allowed stress.
Of these statements the correct ones are
1
1 and 3
2
1 and 2
3
2 and 3
4
1, 2 and 3