Explanation:

- The context is about a fundamental right and its legal protection in India.

- Option 1: Permeably - This word means something that can be penetrated or passed through, which does not relate to legal protection.

- Option 2: Constitutionally - This option refers to being consistent with the constitution, making it the correct choice, as the right to privacy is indeed protected by the Indian Constitution.

- Option 3: Indigenously - Relates to originating or occurring naturally in a particular place; not relevant to legal rights.

- Option 4: Unethically - Indicates actions lacking moral principles; inappropriate for describing a legal right.