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In which case would the particle move in a straight line along the negative direction of y-axis (i.e., move along – y ˆ ) ?

1. (IV) (ii) (S)
2. (III) (ii) (P)
3. (III) (ii) (R)
4. (II) (iii) (Q)

Correct answer: (III) (ii) (R)

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