Which one of the following nuclear reactions is a source of energy in the sun?

  • A
    $_4^9Be + _2^4He \to _6^{12}C + _0^1n$
  • B
    $_1^1H + _1^1H \to _1^2H + _1^0e + \nu$
  • C
    $_{56}^{144}Ba + _{36}^{92}Kr \to _{92}^{236}U \to \dots$
  • D
    $_1^2H + _1^3H \to _2^4He + _0^1n$

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During the nuclear fusion reaction,

When $^{235}_{92}U$ is bombarded with one neutron,fission occurs and the products are three neutrons,$^{94}_{36}Kr$ and:

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