কোনো গ্যাসের বাষ্পঘনত্ব 8 হলে, গ্যাসটি নিচের কোনটি হতে পারে?

A H₂

B O₂

C N₂

D CH₄

Correct Answer & Explanation

Option D

Option D is the correct answer according to official curriculum guidelines.

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