Consider the following statements regarding Directive Principles of State Policy (DPSP) in Part IV of the Constitution of India :

1. The instrument of instructions by British government were instructions to executive only whereas the DPSP are instructions to both legislature and executive.

2. It places legal obligation on the government to implement them.

3. They are meant for promoting the ideals of Political Democracy.

4. They make provisions for certain non-justiciable rights to the citizens.

How many of the above statements are correct?