Directions: The following item consists of a sentence followed by four words or group of words. Select the synonym of the word (occurring in the sentence in capital letters) as per the context.

When there is a fog, there are INNUMERABLE car accidents on the highway.

 Here, countless is the correct option as it implies something that something that is too much in number. Indefinite is something that is lasting for an unknown or unstated length of time, vague refers to uncertain, indefinite, or unclear character or meaning and frequent refers to something that is occurring or done many times at short intervals.