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Statement – I: In negative $β$ decay, when the directions of motion of emitted electron and recoiling nuclei are observed, then most of the times they are not exactly opposite as required for linear momentum to be conserved.
Statement – II: In negative $β$ decay antineutrino is also emitted.

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Statement I is true, Statement II is false

Statement I is true, Statement II is true and statement II is correct explanation for Statement II

Statement I is false, Statement II is true

Statement I is true, Statement II is true and statement II is not correct explanation for Statement II

answer is A.

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