Assertion(A): specific charge of α− particle is twice to that of proton.
Reason(R): Specific charge is given by e/m.
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true, But R is false
A is false, But R is true
Specific charge of proton = 2 times specific charge of α particle