Correct option is B
Sharda v. Dharmapal (2003) is a landmark case dealing with mental illness and the issue of compelling a party to undergo medical examination in matrimonial disputes under the Hindu Marriage Act. It does not relate to live-in relationships.
The other cases do deal with live-in relationships:
(A) Indra Sarma v. K.V. Sarma (2013): The Supreme Court recognized live-in relationships under the Domestic Violence Act, 2005, classifying them under “relationships in the nature of marriage.”
(C) S. Khushboo v. Kanniammal (2010): In this case, the Court upheld individual autonomy and freedom of expression, including a defense of live-in relationships as not illegal or immoral in the eyes of law.
(D) Chanmuniya v. Chanmuniya Kumar Singh (2010): The Supreme Court recommended that women in de facto marriages or live-in relationships should be extended protection under Section 125 CrPC (maintenance).