Explanation:

- Divorced wife so long as she does not marry: Entitled to maintenance. Section 125 of the CrPC allows a divorced woman to claim maintenance until she remarries.

- Unmarried sister: Not entitled to claim maintenance. Section 125 does not cover siblings, hence an unmarried sister cannot claim maintenance.

- Adoptive mother: Entitled to maintenance. The law includes parents, which extends to adoptive parents, allowing them to claim maintenance.

- Illegitimate minor child: Entitled to maintenance. The law provides for both legitimate and illegitimate minor children to receive maintenance.

?? Unmarried sister