Which one of the following is the longest Latitude ?

Which one of the following is the longest Latitude ?

90 degree Latitude
23.5 degree Latitude
0.0 degree Latitude
66.5 degree Latitude
This question was previously asked in
UPSC NDA-1 – 2021
The correct answer is 0.0 degree Latitude.
Latitudes are imaginary circles parallel to the equator. The equator (0 degrees latitude) is the largest circle of latitude. As the latitude increases towards the poles (90 degrees North or South), the circumference of the parallel of latitude decreases, becoming a point at the poles.
The equator is the line of latitude equidistant from the North and South poles, dividing the Earth into the Northern and Southern Hemispheres. All other parallels of latitude are smaller circles. Therefore, the 0.0-degree latitude (the equator) is the longest latitude.