The Residential place of the Britain Prime Minister is at _____________?

A. 10-Downing Street
B. White House
C. Black House
D. None of these

Explanation:

10 Downing Street, the locale of British prime ministers since 1735, vies with the White House as being the most important political building anywhere in the world in the modern era. Behind its black door have been taken the most important decisions affecting Britain for the last 275 years.