Which of the following liquids falls into the category of flammable and combustible liquids?

Turpentine is classified as a flammable liquid due to its low flash point, which means it can easily ignite at relatively low temperatures. Flammable liquids are those that have a flash point below 100 degrees Fahrenheit (37.8 degrees Celsius), making them easily susceptible to catch fire when exposed to an open flame or heat source. In contrast, substances like water, glycerin, and vinegar do not have enough volatile compounds to ignite under normal conditions, thus they do not belong to the category of flammable or combustible liquids. Water is a non-combustible liquid, glycerin has a higher flash point, and vinegar, being primarily acetic acid diluted in water, also lacks flammable characteristics. Therefore, turpentine stands out as the correct choice for being categorized as a flammable liquid.