Which one is conjunction?

Which one is conjunction? Correct Answer or

Very একটি adverb. Out - adjective/ adverb হিসেবে ব্যবহৃত হতে পারে। For - appropriate preposition. Option 'or' একটি conjunction. কারণ এটি সংযোগ সাধন করে। For example : Do or die. সুতরাং সঠিক উত্তর (ক)।

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Which one is a conjunction?
Which one is the conjunction?