\[\begin {array} {1 1} (a)\;\tan(1+ \log x^2 ) -(\log x^2 +1)+c \\ (b)\;\tan(1+ \log x^2 ) +(\log x^2 +1)+c \\ (c)\;\frac{3}{2} \tan(1+ \log x^2 ) -(\log x^2 +1)+c \\ (d)\;None \end {array}\]