The charge-to-mass ratio r of a particle is given by the equation shown.
$r{\text{ }} = {\text{ }}\frac{{charge{\text{ }}on{\text{ }}particle}}{{mass{\text{ }}of{\text{ }}particle}}$
The value of $r$ is determined for an α-particle, a $β^+$ particle and a proton $p$.
Which list shows the particles in order of increasing magnitude of $r$ from left to right?
1 )
$α→β⁺→p$
$α→p→β⁺$
3 )
$p→α→β⁺ $
4 )
$p→β⁺→α$
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