Which of the following will be the appropriate meaning of the word 'Preamble'?

♦ Preamble (noun)
English Meaning: An introduction to a speech or piece of writing.
Bangla Meaning: (বিশেষত কোনো আনুষ্ঠানিক দলিলের) প্রস্তাবনা।

Synonyms: Introduction (উপস্থাপনা), Foreword (প্রারম্ভিক মন্তব্য), Prelude (প্রস্তাবনা), Origin (মূল), Commencement (সূচনা)। 
Antonyms: Epilogue (সাহিত্যকর্মের সমাপ্তি অংশ), Epilogue (উপসংহার), Postscript (পুনশ্চ), Supplement (সম্পুরক), Sequel (পরিশিষ্ট)।

Example Sentence:
1. There has been much historical analysis of preambles and what has happened to them.
2. His early travels were just a preamble to his later adventures.

অন্য অপশন,
- Obviate: To remove a difficulty, especially so that action to deal with it becomes unnecessary.
- Tacit: Understood without being expressed directly.
- Indeterminate: Not clearly determined or established.

Source: Lecture.