For providing a raft foundation, the following activities are involved i) Ramming the foundation bed ii) Excavation of the soil upto required depth iii) Laying the reinforcement over the foundation bed iv) Curing the cement concrete placed over reinforcement v) Pouring the cement concrete over the reinforcement The correct sequence is A. i, ii, iii, iv, v B. v, iv, iii, ii, i C. ii, i, iii, v, iv D. iii, ii, v, i, iv

The correct sequence is:

1. Excavation of the soil upto required depth
2. Ramming the foundation bed
3. Laying the reinforcement over the foundation bed
4. Pouring the cement concrete over the reinforcement
5. Curing the cement concrete placed over reinforcement

Explanation:

1. The first step is to excavate the soil to the required depth. This will create a hole in the ground that is large enough to accommodate the raft foundation.
2. The next step is to ram the foundation bed. This is done by compacting the soil at the bottom of the hole to create a solid foundation for the raft foundation.
3. Once the foundation bed is in place, the reinforcement can be laid. The reinforcement is a network of steel bars that will help to strengthen the raft foundation.
4. The next step is to pour the cement concrete over the reinforcement. The cement concrete will harden and create a solid foundation for the structure.
5. The final step is to cure the cement concrete. This is done by keeping the cement concrete moist for a period of time. This will help the cement concrete to harden and reach its full strength.

The other options are incorrect because they do not follow the correct sequence of steps.