Q. Consider the following statements
1.Atom bomb is based upon the principle of uncontrolled nuclear fusion
2.Hydrogen bomb is based upon the principle of uncontrolled nuclear fission
3.Nuclear reactor is based upon the principle of controlled nuclear fission
Which of the statements given above is/are correct?

• (A) 3 only
• (B) 1 and 2
• (C) 2 and 3
• (D) 1, 2 and 3