Correct Answer - C
In the above reaction, `""^(-)OH` and `""^(-)CI` both are electron rich species as they are holding the negative charge. So, they are nucleophiles
The above reaction show `S_(N)2` mechanism, carbon of alkyl halide is `sp^(3)` hybridised.
During this mechanism, the breaking of C-X bond and formation of new bond (C-Nu) occur simultaneously through a transition state in which carbon atom is approximately `sp^(2)` hybridised.