His birthday is . . . . . . . . next Sunday. A. in B. at C. on D. for

in
at
on
for

The correct answer is C. on.

The preposition “on” is used to indicate a specific day or date. In this case, the speaker is referring to a specific day, which is next Sunday.

The other prepositions do not make sense in this context.

  • The preposition “in” is used to indicate a period of time. For example, “His birthday is in July.”
  • The preposition “at” is used to indicate a specific time. For example, “His birthday is at 12:00 PM.”
  • The preposition “for” is used to indicate a duration of time. For example, “His birthday is for one day.”