DEMONSTRATIVE PRONOUNS
Demonstrative pronouns agree in gender and number
with the noun they are replacing. They are always
followed by a relative pronoun (qui, que, où) or
preposition (de, en, pour, etc.).
To point something out in particular, the following
compound forms are used:
celui-ci / celui-là celle-ci / celle-là
ceux-ci / ceux-là celles-ci / celles-là
Ex. : Tu préfères quelle montre ? Celle-ci ou celle-là ?
Lexique et grammaire en action — Exercice 13