The correct passive form of `You must shut these doors` is-
These must be shut doors
Shut the doors you must
Shut must be the doors
These doors must be shut
Explanation:
Correct Answer is: These doors must be shut
Modal auxiliary যুক্ত active sentence কে Passive করার জন্য object কে subject + modal auxiliary + be + মূল verb এর past participle + extension ব্যবহৃত হয়। সুতরাং নিয়মানুযায়ী (ঘ) সঠিক।