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Suppose the law of gravitational attraction suddenly changes and becomes an inverse cube law i.e. , $F\propto 1/{r}^{3}$ but still remaining a central force. Then

(a) Keplers law of areas still holds

(b) Keplers law of period still holds

(c) Keplers law of areas and period still hol

(d)Neither the law of areas, nor the law of period still hold