I was born . . . . . . . . July 10th. A. on B. in C. at D. of

on
in
at
of

The correct answer is A.

The preposition “on” is used to indicate a specific date or day of the week. For example, “I was born on July 10th.”

The preposition “in” is used to indicate a month or year. For example, “I was born in July.”

The preposition “at” is used to indicate a specific time. For example, “I was born at 12:00 AM.”

The preposition “of” is used to indicate a part of something. For example, “I was born in the month of July.”

In the sentence “I was born on July 10th,” the preposition “on” is used to indicate the specific date of the speaker’s birth.