Institution: Directorate of Primary Education - DPE Exam: Primary Exam Question Solution 21-06-2019
Topic: সন্ধি, Subject: Bangla Grammar (বাংলা ব্যাকরণ)

Best Answer Explained in Below-:

The question "সংবিধান শব্দের সন্ধি বিচ্ছেদ কোনটি?" is asking for the correct morphological breakdown (sandi bichhed) of the word "সংবিধান" in Bengali. The term "সংবিধান" can be analyzed by understanding its components.

The word "সংবিধান" can be separated into two distinct parts: "সং" (sang) and "বিধান" (bidhan). Here, "সং" means "together" or "with," and "বিধান" refers to "regulation" or "law." Thus, "সংবিধান" translates to "the constitution," which serves as the fundamental set of laws that govern a nation together.

Now, let’s assess the options:

- **A) সম+ বিধান**: This option is incorrect because "সম" (meaning 'complete' or 'whole') does not relate to "সং" at all.
- **B) সং+ বিধান**: This is the correct option, aligning perfectly with our breakdown of the word.
- **C) সং + অবিধান**: This option adds "অ" (a negation prefix) which is not part of the original word.
- **D) সম+ ধান**: This is also incorrect because it assumes a different structure entirely.

Thus, the correct answer is B) সং + বিধান, as it accurately reflects the components of the word "সংবিধান" and maintains its meaning related to a comprehensive legal framework in society.