Hello Aspirant,

The solution is as follows:

PCL3 + 3C2H5OH ------> 3C2H5CL + H3PO3

Option C

Explanation:

1) It can act as a reducing agent: Correct

2) It is basic acid: Correct

3) It has a pyramidal shape: Wrong

4). The oxidation state of phosphorus is + 3: Correct

It has a tetrahedral shape, not pyramidal, due to the absence of lone pair.

I hope this helps!

For any queries, please revert.

Thank you!