Explanation:

- Alienable rights: These are rights that can be transferred or waived by an individual. Consent can be a valid defense since the rights holder can choose to alienate or relinquish such rights.

- Inalienable rights: These rights cannot be surrendered or transferred, even with consent. Examples may include rights related to life, freedom, and dignity. The defense of consent is restrictive here because such rights are inherent and nontransferable.

- Both (a) & (b): Suggests consent could be restrictive in both contexts, but typically it specifically applies to inalienable rights.

- Neither (a) nor (b): Implies consent is not restrictive in any rights context, which is incorrect.

The correct answer is Option 2, inalienable rights.

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