Hey can you me posted picture of question

Since the parabola is opening in vertical direction, this shows that the squared term is x.

The sign determines whether the opening is up or down. A negative sign shows a downward opening when the squared term is x.

So, look for the equation with negative coefficient and squared x term. Option A gives such an equation

So, the answer to this question is option A

Wow. that is a really cool question.