Answer:
Option A is the correct option.
Explanation:
Polynomials given in the question are
1)

2)

3)

4)

In a standard form of a polynomial term with the highest degree should be written first, then second highest degree term and similarly other terms should be written.
Here 1st polynomial is in the standard form only in which degree of terms are as followed.
1 term
degree of term = (5 +2) = 7
2nd term
degree of term = (3 +1) = 4
3rd term 10x² degree of term = 2
So the answer is option A.