\[\begin {array} {1 1} (a)\;\frac{1}{\sqrt x} \bigg[-2+ \frac{8}{7}x^3+\frac{8}{3}x^2 \bigg]+c \\ (b)\;\frac{1}{\sqrt x} \bigg[-2+ \frac{8}{7}x^4-\frac{8}{3}x^3\bigg]+c \\ (c)\;\frac{1}{\sqrt x} \bigg[-2+ \frac{8}{7}x^4-\frac{8}{3}x^2\bigg]+c \\ (d)\;None \end {array}\]