Explanation:

- Option 1: 24 January

- National Girl Child Day is indeed observed on 24 January in India.

- The day aims to promote awareness about the rights of the girl child and to reduce the disparities faced by girls in Indian society.

- Initiatives are focused on education, health, and protection of the girl child.

- Correct Answer

- Option 2: 5 June

- Observed as World Environment Day, aimed at encouraging environmental protection.

- Option 3: 12 May

- Celebrated as International Nurses Day, commemorating the birthday of Florence Nightingale.

- Option 4: 9 September

- Recognized as International Day to Protect Education from Attack.