Increasing order (lowest first) for the values of \( \mathrm{e} / \mathrm{m} \) (charge/ mass) f...

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Increasing order (lowest first) for the values of \( \mathrm{e} / \mathrm{m} \) (charge/ mass) for electron (e), proton (p), neutron (n) and \( \alpha \)-particle \( (\alpha) \) is:
(a) \( \mathrm{e}, \mathrm{p}, \mathrm{n}, \alpha \)
(b) \( \mathrm{n}, \mathrm{p}, \mathrm{e}, \alpha \)
(c) \( \mathrm{n}, \mathrm{p}, \alpha, \mathrm{e} \)
(d) \( \mathrm{n}, \alpha, \mathrm{p}, \mathrm{e} \)
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