Option (1) is correct: Mother's right to have the custody of minor child is known as hizanat.
Option (2) is incorrect: Hazina is a female who is entitled to the custody of a minor child.
Option (3) is incorrect: Khula is the right of a woman to seek a divorce from her husband in Islam for compensation paid back to the husband from the wife.
Option (4) is incorrect: Ahula is not a term of any kind under Muslim Law.