Identify the function of the word “to” in the sentence.
“She came to help us finish the project.”

Correct option is A

The correct option is (a).

• Explanation: In the phrase “to help”, the word “to” is used before the base form of the verb “help”. Therefore, it functions as an infinitive marker.
• The infinitive “to help” expresses purpose in the sentence, that is, why she came.
• Hence, “to” is not a preposition here.

Grammar Rule involved (English/ Hindi):
• When “to” is followed by the base form of a verb, it usually acts as an infinitive marker.
• Infinitive purpose, intention या action को व्यक्त कर सकता है।
• यदि “to” के बाद noun/pronoun आता है, तब वह preposition हो सकता है; परन्तु यहाँ उसके बाद verb “help” है।

Meanings of other options:
• Adverb – A word that modifies a verb, adjective, or another adverb (क्रिया विशेषण)
• Particle of emphasis – A word used for emphasis only (ज़ोर देने वाला अव्यय)
• Preposition – A word showing relation between noun/pronoun and another word (संबंधसूचक अव्यय)

So the correct answer is (a)