Which Part of the Constitution of India deals with the Directive Principles of State Policy (DPSP)?

The Directive Principles of State Policy (DPSP) in Part IV of the Indian Constitution were borrowed from which country?

Identify the correct pair mentioning the Directive Principles of State Policy in the Constitution of India -

The Constitution is silent in the Directive Principles of State Policy about –

In Indian Constitution, the idea of the Directive Principles of State Policy has been taken from the Constitution of –

Which Article of the Indian Constitution says that Directive Principles of State Policy are not enforceable by any court?