Consider the following particles:

(A) Proton
(B) $α$ particle
(C) Electron

For charge to mass ratio of the above particles we can say:

$(C)>(A)>(B)$

The correct answer is Option (1) → $(C)>(A)>(B)$

for Proton,

$q_p=+e=1.6×10^{-19}C$

$m_P=1.67×10^{27}kg$

$\frac{q_p}{m_p}≃9.56×10^7c/kg$

for $α$-particle,

$q_α=2e=3.2×10^{-19}C$

$m_α=4m_p=6.68×10^{27}kg$

$\frac{q_α}{m_α}≃4.79×10^7c/kg$

for electron,

$q_e=-1.6×10^{-19}C$

$m_e=9.11×10^{-31}kg$

$\frac{q_e}{m_e}≃1.76×10^{11}c/kg$

$∴\frac{q_e}{m_e}>\frac{q_p}{m_p}>\frac{q_α}{m_α}$