Which two-dimensional figure will create a cone with a radius of 3.5 and a height of 7?

A triangle has sides lengths of 7 and 3.5. A line of rotation is at the point opposite to the side with length 7.

A triangle has sides lengths of 7 and 3.5. A line of rotation is at the side with length 3.5.

A triangle has sides lengths of 7 and 3.5. A line of rotation is at the side with length 7.