The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is

Given data : It is given to identify the best reagent to convert pent-3-en-2-ol into pent-3-en-2-one.

Explanation 

We have to convert pent-3-en-2-ol into pent-3-en-2-one.
First, consider the structure of pent-3-en-2-ol then we will get
 

Then we will convert this into pent-3-en-2-one, then we will get

Other reagents may give over oxidised products.
Hence, the correct option (C). Chromic anhydride in glacial acetic acid