\\\\(\ extbf{Solution}:\\\\)1. The flow of heat is proportional to the surface area or area of cross-section.2. We know that, the surface area of a cylindrical bulb is more than that of spherical surface. 3. Therefore, the thermometer with cylindrical bulb responds more quickly to temperature change than the thermometer with spherical bulb.\\\\(\ extbf{Hece A is the correct option}\\\\)