Q. With reference to Europe in 15th century, the Treaty of Tordesillas is signed between?

[A] Portugal and Egypt

[B] Spain and Greece

[C] Spain and Portugal

[D] France and Portugal

Answer: C
Notes:

Under the Treaty of Tordesillas (1494), the rulers of Portugal and Spain divided the non-Christian world between them by an imaginary line in the Atlantic, some 1,300 miles west of the Cape Verde Islands.  

Under the treaty, Portugal could claim and occupy everything to the east of the line while Spain could claim everything to the west. 

Source: Spectrum Modern India.