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The increasing order (lowest first) for the values of `e//m` (charge/mass) for electron `(e)`, proton `(p)`, neutron `(n)`, and alpha particle `(alpha)` is

A

e,p,n, alpha

B

p,n,e, alpha

C

n,p, alpha,e

D

n, alpha,p,e

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The correct Answer is:
D
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