There is no attached image of a map, hence the questions will be answered based on the general knowledge of map reading.
Cartographers divide the world into two hemispheres, the Eastern and the Western Hemispheres.
The line that divides the Western and Eastern Hemispheres is the The prime meridian.
The letter B which represents Asia, is located in the Western Hemispheres.
The prime meridian refers to an imaginary line meridian in a geographic coordinate system at which longitude is defined to be 0°.
This meridian together with the international date line divides the earth into the Eastern and the western Hemispheres.
Cartography represents the art or science of graphically drawing or making representations of the earth on a fap surface or map. This is usually done by people known as cartographers.
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