Step 1: Adoption in personal laws.
- Under Muslim personal law, there is no concept of full adoption as under Hindu law; instead, there is “acknowledgment of paternity” and guardianship concepts.
Step 2: Applicability of JJ Act, 2015.
- The JJ Act, 2015 is a secular law allowing adoption irrespective of religion.
- Section 56(3) of JJ Act allows adoption by any person, including Muslims, Christians, Parsis, Hindus, provided conditions under the Act are met.
Step 3: Elimination of other options.
- (a) applies only to Hindus, Buddhists, Jains, Sikhs.
- (b) governs guardianship, not full adoption.
- (c) does not cover adoption; deals with application of Muslim personal law.
\[
\boxed{(d)}
\]