They proposed to hold a meeting. (passive)

The correct answer is - গ) It was proposed by them to hold a meeting.

- Double Passive: যখন দুটি passive construction একসাথে ব্যবহৃত হয়।
- যেমন - was proposed + to be held - এটি বিভ্রান্তিকর অর্থ তৈরি করে।

Active : They proposed to hold a meeting.
এখানে was proposed এবং to be held এই দুইটিই passive.
Passive: It was proposed by them to hold a meeting.
or, To hold a meeting was proposed by them.

Incorrect: A meeting was proposed to be held by them.

Other options
খ) A meeting was held to be proposed by them.
- ক্রিয়ার ক্রম ও অর্থ ভুল, "held" ও "proposed" একসঙ্গে এইভাবে ব্যবহার হয় না।

গ) It was proposed by them to hold a meeting.
- যদিও অর্থ বোঝায়, এটি passive sentence কিন্তু মূল বাক্যের passive রূপ নয়।

ঘ) A meeting proposed to be held by them.
- "was" সাহায্য ছাড়া বাক্য অসম্পূর্ণ ও grammar ভুল।

Source: A Passage to the English Language by S M Zakir Hussain.