If you pour a few drops of petrol on your palm, it will feel cool as the petrol evaporates. This change is a/an:

In an endothermic reaction, heat is absorbed and thus a cooling effect can be experienced. In an exothermic reaction, heat is evolved and one can experience hotness. In a chemical reaction, a chemical change is taking place and in a slow reaction, the reaction takes place rapidly. The evaporation of petrol is not a chemical reaction and not a slow process. Since cooling is experienced, it is an endothermic reaction. Hydrocarbons that are flammable and volatile makeup gasoline. At room temperature, it readily evaporates when it comes into touch with a bigger surface. It is a reaction. Because gasoline easily evaporates, it requires latent heat of vaporization, which is why it absorbs the heat energy from our hands and causes us to feel chilled. The heat absorbed as a substance transforms from a liquid to a gas is known as latent heat of vaporization. It is an endothermic process since heat is needed for the material to evaporate.

Hence, option A is correct.