Answer with explanation:
Considering Earth as a Sphere,and if we join two ends , that is two poles,then distance between two poles,that is between North Pole and South Pole is greatest.
→Maximum possible distance between surface of a sphere is,
=Diameter of Sphere
=Distance Between two poles which are Opposite Ends of Sphere
→→Distance between two poles has a Unique word called Antipodal.
Option C: Antipodal