Constitution cnshrine provisions for the education of children from 0 to 6 years

Consider the following:
1. Fundamental Rights
2. Fundamental Duties
3. Directive principles of State Policy
Which among the following above part of the constitution cnshrine provisions for the education of children from 0 to 6 years?
(a) Only 1 and 2
(b) Only 3
(c) Only 2 and 3
(d) All of the above