Let $(\mathrm{x}, \mathrm{y})$ be such that $$ \sin ^{-1}(a x)+\cos ^{-1}(y)+\cos ^{-1}(b x y)=\frac{\pi}{2} . $$ Match the statements in Column I with the statements in Column II and indicate your answer by darkening the appropriate bubbles in the $4 \times 4$ matrix given in the ORS.