Final answer:
The length of the major axis is 4, the same as the length of the minor axis. Hence the correct answer is option B
Step-by-step explanation:
The major axis of an ellipse is the longest diameter of the ellipse. Since the length of the minor axis is 4, the major axis will also have a length of 4, as the length of the major and minor axes are equal in an ellipse.
Hence the correct answer is option B