What is the standard equation of a circle with center (-2, 3) and radius 4?

✓ Correct Answer: Option C

The standard equation is (x-h)² + (y-k)² = r². Given (h,k) = (-2,3) and r = 4, substitute to get (x - (-2))² + (y - 3)² = 4², which simplifies to (x + 2)² + (y - 3)² = 16.