The correct answer is C. Low work function.
The work function of a metal is the minimum amount of energy required to remove an electron from the metal’s surface. If the energy of the light is greater than or equal to the work function, then the photoelectric effect will occur.
Metals with a low work function are more likely to undergo
the photoelectric effect because they require less energy to remove electrons from their surface. This is because the electrons in metals are loosely bound to the metal atoms.Metals with a high work function are less likely to undergo the photoelectric effect because they require more energy to remove electrons from their surface. This is because the electrons in metals with a high work function are more tightly bound to the metal atoms.
The melting point of a metal is the temperature at which it changes from a solid to a liquid. The resistance of a metal is the opposition to the flow of electric current. The melting point and resistance of a metal are not related to the photoelectric effect.