Explanation:

• - The term "Conscience of the Constitution" generally refers to parts that embody the spirit and philosophy of the Constitution.
• - Option 1: Preamble and Fundamental Duties - Incorrect, as Fundamental Duties do not embody the core conscience.
• - Option 2: Preamble and Directive Principles of State Policy - Partially correct, as the Preamble and Directive Principles reflect philosophical aspects.
• - Option 3: Fundamental Rights and Fundamental Duties - Incorrect, as Fundamental Duties are not considered the "Conscience."
• - Option 4: Fundamental Rights and Directive Principles of State Policy - Correct, as these parts together capture the Constitution's moral and ethical essence.
• Correct Answer: Option 4: Fundamental Rights and Directive Principles of State Policy