Which of the following Fundamental Duties are mentioned in Part IVA of the Indian Constitution?
1. To abide by the Constitution and respect its ideals and institutions.
2. To provide for early childhood care and education to children below the age of six years.
3. To protect and improve the natural environment including forests, lakes, rivers and wild life.
4. To promote international peace and security.
5. To uphold and protect the sovereignty, unity and integrity of India.
6. To develop scientific temper, humanism and the spirit of inquiry and reform.
Select the correct answer using the code given below.