Water droplets are formed on the outer surface of a glass containing ice-cold water. Why?
(A) Condensation
(B) Evaporation
(C) Vaporization
(D) Both B and C

Hint :In physics, a state of matter is one of the various forms that matter can take. In everyday life, four states of matter are visible: solid, liquid, gas, and plasma. Many intermediate states, such as liquid crystal, are known to exist, and some states, such as Bose-Einstein condensates, neutron-degenerate matter, and quark-gluon plasma, are known to exist only occur respectively, in situations of extreme cold, extreme density, and extremely high energy.

Complete Step By Step Answer:
Option A: Condensation: Condensation is the physical state change of matter from the gas phase to the liquid phase, and it is the inverse of vaporization. The term is most commonly used to refer to the water cycle. It is also defined as the transformation of water vapor to liquid water when it comes into contact with a liquid or solid surface or cloud condensation nuclei in the atmosphere. The deposition is a change that occurs when a gaseous phase directly transitions into a solid phase.
Option B: Evaporation: Evaporation is a type of vaporization that takes place on the surface of a liquid as it transitions into the gas phase. The evaporating substance must not be saturated in the surrounding gas. When the liquid molecules collide, they transfer energy to each other based on how they collide. A molecule near the surface will absorb enough energy to overcome the vapor pressure, it will escape and enter the surrounding air as a gas.
Option C: vaporization: A phase transition from the liquid to the vapor phase is referred to as vaporization (or vaporization) of an element or compound. Evaporation and boiling are the two types of vaporization. Boiling is a bulk phenomenon, whereas evaporation is a surface phenomenon.
In the above case, When water vapor in the air comes into contact with a cold glass of water, it loses energy and becomes liquid, which we see as water droplets. This is called condensation.
Thus, the answer is option A: Condensation.

Note :
Condensation occurs most frequently when a vapor is cooled or condensed to a density that cannot support the entire number of water molecules and must thus be dispersed as a liquid. The formation of clouds, as described in the water cycle, is the result of the condensation process.