The Instrument of Instructions, which was initially found in the Government of India Act, 1935, was incorporated into the Constitution of India in 1950 as the Directive Principles of State Policy.

Option 1: Fundamental Rights. The Fundamental Rights are a set of individual rights that are guaranteed to every citizen of India. Examples of Fundamental Rights include the right to freedom of speech and expression, the right to equality, and the right to protection from discrimination. However, the Instrument of Instructions is not related to the Fundamental Rights.

Option 2: Directive Principles of State Policy. The Directive Principles of State Policy are a set of guidelines and principles that the State is expected to follow while making laws and policies. These principles are aimed at achieving social and economic justice in society. The Instrument of Instructions was incorporated into the Constitution as the Directive Principles of State Policy, making this the correct option.

Option 3: Extent of Executive Power of State. The extent of executive power of the State is defined by the Constitution and is not related to the Instrument of Instructions.

Option 4: Conduct of Business of the Government of India. The conduct of business of the Government of India is determined by the rules and procedures set forth in the Constitution and is not related to the Instrument of Instructions