2020 AMC 12B Problem 4

The acute angles of a right triangle are a^{\circ} and b^{\circ}, where a>b and both a and b are prime numbers. What is the least possible value of b?

\textbf{(A) }2\qquad\textbf{(B) }3\qquad\textbf{(C) }5\qquad\textbf{(D) }7\qquad\textbf{(E) }11

Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.