For limit state of collapse, the partial safety factors

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For limit state of collapse, the partial safety factors recommended by IS 456: 2000 for estimating the design strength of concrete and reinforcing steel are respectively

1. 1.15 and 1.5
2. 1.0 and 1.0
3. 1.5 and 1.15
4. 1.5 and 1.0

Correct Option: C

1.5 and 1.15