Supercooling is cooling of liquid ________ A. Below melting point B. Below freezing point C. At melting point D. Above melting point

The correct answer is: A. Below melting point.

Supercooling is the process of cooling a liquid below its freezing point without it becoming a solid. This can happen when the liquid is cooled very slowly or when it is in a very clean environment. When a supercooled liquid is disturbed, such as by being shaken or

Option B is incorrect because freezing point is the temperature at which a liquid changes into a solid. Option C is incorrect because melting point is the temperature at which a solid changes into a liquid. Option D is incorrect because a liquid cannot be cooled above its melting point.