The correct answer is option 'C', which states that the national flag of India was presented to the nation at the midnight session of the Constituent Assembly on 14th August 1947 on behalf of the women of India. Below is a detailed explanation of this answer:

1. Adoption of the national flag:
- The national flag of India was adopted by the Constituent Assembly on 22nd July 1947. The Constituent Assembly was responsible for drafting the Constitution of India and was comprised of representatives from various sections of society.

2. Significance of the date:
- The midnight session of the Constituent Assembly on 14th August 1947 holds immense significance as it marked the eve of India's independence from British rule. At this session, the national flag was presented to the nation, symbolizing the birth of a free and sovereign India.

3. Representation of the women of India:
- The national flag was presented to the nation on behalf of the women of India. This is because the design and colors of the flag hold deeper meanings that represent the aspirations and values of the Indian people, including women.

4. The design of the national flag:
- The national flag of India consists of three horizontal stripes of equal width. The top stripe is saffron, representing courage and sacrifice. The middle stripe is white, symbolizing peace and truth. The bottom stripe is green, signifying fertility, growth, and auspiciousness.
- In the center of the white stripe, there is a navy blue Ashoka Chakra (wheel) with 24 spokes, representing the eternal wheel of law. This Chakra symbolizes the righteousness and progress of the nation.

5. Inclusion of women's representation:
- The national flag is a symbol of national unity and identity. By presenting the flag on behalf of the women of India, the Constituent Assembly acknowledged and honored the significant role played by women in the freedom struggle and their contribution to the nation-building process.
- This gesture also aimed to inspire and empower women, highlighting their equal participation and representation in the nation's progress and development.

In conclusion, the national flag of India was presented to the nation at the midnight session of the Constituent Assembly on 14th August 1947 on behalf of the women of India. This representation aimed to recognize the role of women in the freedom struggle and emphasize their importance in the nation's growth and development.