World War II

In each of the following questions, two words are paired which a have a certain relation. Select a correct option to substitute question mark, so as to make a similar relational pair with the word given after double colon ( : : ) World War II : United Nations : : World War I : ? (A) Treaty of Versailles (B) International Commission of jurists (C) League of Nations (D) International Court of Justice

Precise measurements of physical quantities are a need of science. For example to escertain the speed of an aircraft, one must have an accurate methi=od to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. think of different examples in modern science where precise measurements of length, time, mass etc, arc needed. Also, whereever you can, give a quantitative idea of the precision needed.