If the total energy of a particle is thrice its rest mass energy, then the velocity of the particle in terms of velocity of light c is
1
\(\frac{c}{3}\)
2
\(\frac{{2c}}{3}\)
3
\(\frac{{2\sqrt 2 }}{3}c\)
4
\(\frac{{\sqrt 2 }}{3}c\)
5
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