Which country has announced that it has carried out its first hydrogen bomb test?

a. South Korea

b. North Korea

c. China

d. Japan

ANSWER: North Korea

Explanation:

North Korea has conducted a powerful hydrogen bomb test on 6th January 2015 which will see a huge jump in Pyongyang’s quest for improving still limited nuclear arsenal. South Korea’s spy agency and external nuclear experts however, cast doubt on this announcement. A successful H Bomb will be a major achievement for N. Korea as these bombs are 100 times more powerful than atomic bomb using fission. Within a hydrogen bomb, radiation from nuclear fission explosion will set off a chain of reactions responsible for the blast and consequent radioactivity.