Identify the preposition in :The man is sleeping on a cot. 

Correct option is A

• "On" is a preposition indicating the location of the man in relation to the cot.
• "Man" is a noun referring to a person.
• "Is" is a verb helping to form the present continuous tense of "sleeping."
• "The" is a definite article used to specify the noun "man."
• Since "on" is showing the relationship between "sleeping" and "cot," it is the preposition in the sentence.