A particle of mass \( 4 \mathrm{~m} \) at rest decays into two particles of masses \( m \) and \...

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A particle of mass \( 4 \mathrm{~m} \) at rest decays into two particles of masses \( m \) and \( 3 m \) having nonzero velocities. The ratio of the de Broglie wavelengths of the particles 1 and 2 is
(A) \( 1 / 2 \)
(B) \( 1 / 4 \)
(C) 2
(D) 1
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