The expression in its simplest form cannot be simplified or factorized any further.
From the options given, answer option A, which is
![2x^2\sqrt[]{7y}](https://img.qammunity.org/2023/formulas/mathematics/college/skzimwkymotpmzj8uwzxznij5vnrch99l3.png)
Cannot be factored any further.
This expression is in its simplest form.
The others, that is options B, C and D can be simplified further.
The answer is option A