Correct Option (b):
The 'Instrument of Instructions' contained in the Government of India Act, 1935, served as directives issued to the Governor-General and Governors. These instructions guided them in the exercise of their executive power and in framing policy decisions, but they were not legally enforceable by any court.
In the Constitution of India, adopted in 1950, a similar concept was incorporated in Part IV as the Directive Principles of State Policy (DPSP). The DPSPs provide fundamental guidelines to the state for formulating laws and policies aimed at achieving socio-economic justice and welfare. Like the 'Instrument of Instructions', DPSPs are not legally enforceable by courts, yet they are considered fundamental to the governance of the country. Dr. B.R. Ambedkar acknowledged that these principles were inspired by the Irish Constitution and the 'Instrument of Instructions'.
Incorrect Options:
(a) Fundamental Rights: Fundamental Rights are enshrined in Part III of the Constitution and are legally enforceable by the courts. This contrasts with the non-binding nature of the 'Instrument of Instructions' and the Directive Principles of State Policy.
(c) Extent of executive power of State: The extent of executive power of the State is defined by specific articles in the Constitution (e.g., Articles 154-162 for states), which delineate the scope and exercise of governmental authority. This is distinct from the policy-guiding principles found in the 'Instrument of Instructions'.
(d) Conduct of business of the Government of India: The conduct of business of the Government of India (and states) is governed by Articles 77 and 166 respectively. These articles lay down procedural rules for the transaction of government business, rather than providing broad policy directives as the 'Instrument of Instructions' did.