To determine which province had the maximum representation in the Constituent Assembly of India as of $31^{\text{st}}$ December, 1947, historical data on the composition of the assembly is required.
Based on the composition of the Constituent Assembly by the specified date:
The United Provinces consistently provided a substantial portion of the members due to its large population and political significance during that era.
Therefore, the United Provinces held the maximum representation in the Constituent Assembly of India on $31^{\text{st}}$ December, 1947.
Which article of Indian constitution is related with Official language of the Union?
In which year was the Indian ‘Wildlife (Protection) Act’ implemented?
Which article of the Indian constitution was called the 'heart and soul' of the constitution by Dr. B. R. Ambedkar?
In 1946, who among the following was made the interim president of the Indian Constituent Assembly ?
Who was the Chairman of the Drafting Committee of the Constituent Assembly of India?