Step 1: Understanding the Concept:
The Constituent Assembly was the body tasked with the monumental responsibility of drafting the legal and political framework of independent India.
Step 2: Detailed Explanation:
The first session of the Constituent Assembly began on December 9, 1946.
The Constitution was finally adopted and passed on November 26, 1949.
The precise duration of the Assembly's work to complete the draft was 2 years, 11 months, and 18 days.
In many standard examination formats, "17 days" is listed as the option (as seen in the provided image), which is often considered acceptable depending on whether the first and last days are both counted inclusively.
Comparing the options, Option (B) is the closest and universally accepted answer in this context.
Step 3: Final Answer:
The Assembly took approximately two years, eleven months, and seventeen (or eighteen) days to finalize the Constitution.