Explanation:

- Private wrongs: These involve disputes between individuals, such as torts or breaches of contract. The defense of consent often applies here, as individuals can agree to certain risks or actions.

- Public wrongs: These are crimes against society, where consent is typically not a valid defense, as they affect public order.

- Both (a) and (b): Suggests that consent applies to both, which is generally incorrect since public wrongs don't usually allow consent as a defense.

- None: Implies that consent is not a defense in either type, which is incorrect because it is often applicable in private wrongs.

Option 1: Private wrongs is correct.