When the temperature is lowered and pressure is raised,the adsorption of a gas on a solid

The Langmuir adsorption isotherm is deduced using the assumption that:

Adsorption is a phenomenon in which a substance

Which of the following statements is correct?

Assertion $(A)$: The property of adsorption is shown to a greater extent by solids than liquids.
Reason $(R)$: Solids like charcoal and silica can act as good adsorbents.

The Freundlich adsorption isotherm gives a straight line on plotting: