A) France, Spain, Algeria and Mali
B) U.K., Morocco, Niger and Nigeria
C) Cameroon, Gabon, Congo and Angola
D) Namibia, Portugal, Denmark and Belgium
Correct Answer: A
Solution :
[a] A prime meridian is a meridian (a line of longitude) in a geographical coordinate system at which longitude is defined to be\[0{}^\circ \]. Together, a prime meridian and its antimeridian (the 180th meridian in a \[360{}^\circ \]-system) form a great circle. This great circle divides the sphere, e.g. the Earth, into two hemispheres.
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