A kink is present near bulb in which of the following thermometers?

Clinical Thermometer

The correct answer is option 2. Clinical Thermometer.

A kink is present near the bulb in a Clinical Thermometer. The kink serves as a constriction that prevents the mercury from flowing back into the bulb after temperature measurement. This design feature allows users to read the maximum temperature reached, even after removing the thermometer from the measured object or body. The kink remains in place until manually reset, ensuring accurate temperature readings.