Identify the part of speech of the highlighted word.
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Correct option is B

The correct answer is (b) Conjunction.
• “Unless” introduces a condition: “if not”.
• It joins the main clause with the subordinate conditional clause.
• Therefore, it is a subordinating conjunction.
Grammatical Rule Used (English):
• Subordinating conjunctions introduce dependent clauses (because, although, if, unless).
Grammatical Rule Used (Hindi):
• “unless” शर्त (condition) बताता है और subordinate clause जोड़ता है।
• इसलिए यह subordinating conjunction है।
Meanings of the other options:
• (a) Preposition: shows relation (in, on, at) (सम्बन्ध बताने वाला शब्द)
• (c) Adverb: modifies verb/adjective/adverb (quickly, very) (क्रिया-विशेषण)
• (d) Interjection: sudden feeling (wow, alas) (विस्मयादिबोधक)