Background:
The demand for a Constituent Assembly in India was made by the Indian National Congress (INC), a political party that played a significant role in the Indian independence movement. The INC was formed in 1885 and became the leading organization advocating for independence from British rule. The idea of a Constituent Assembly emerged as a means to draft a constitution for an independent India.

INC's Demand for a Constituent Assembly:
The Indian National Congress first officially made the demand for a Constituent Assembly in 1934. The demand was made during the Karachi session of the INC, which was presided over by Jawaharlal Nehru. The session adopted a resolution that called for the establishment of a Constituent Assembly to frame a constitution for India.

Reasons behind the Demand:
1. Representation: The INC wanted a Constituent Assembly to be representative of the diverse population of India. They believed that a constitution should be drafted by elected representatives who could consider the interests and aspirations of different communities and regions.

2. Self-Governance: The demand for a Constituent Assembly was a reflection of the INC's commitment to self-governance. They believed that the people of India should have the right to determine their own political structure and laws.

3. Unity and Integration: The INC saw the Constituent Assembly as a means to promote unity and integration among the diverse regions and communities of India. They believed that a constitution drafted by representatives from various backgrounds would help in fostering a sense of national unity.

4. Democratic Principles: The demand for a Constituent Assembly was in line with the democratic principles espoused by the Indian National Congress. They believed in the importance of a participatory and inclusive process in framing a constitution.

Outcome:
The demand for a Constituent Assembly gained momentum, and it was eventually accepted by the British government. In 1946, the British Cabinet Mission announced a plan for the formation of a Constituent Assembly in India. The members of the Assembly were to be elected by the provincial legislatures, and it would be responsible for drafting the constitution of independent India.

Conclusion:
The Indian National Congress made the demand for a Constituent Assembly in 1934 during its Karachi session. This demand was based on the principles of representation, self-governance, unity, and democratic participation. The demand eventually led to the formation of the Constituent Assembly in 1946, which played a crucial role in drafting the constitution of independent India.