Explanation:

- According to Section 30(5) of the Indian Partnership Act, a minor admitted to the benefits of a partnership must decide whether to become a full partner or leave the firm after attaining majority.

- The law provides a specific time frame for the minor to make this choice.

- Option 1: One month of attaining majority

This is incorrect. The period is not just one month.

- Option 2: Six months of attaining majority

This is the correct option. The minor has up to six months after becoming a major, or from when they first learn they were part of the partnership, whichever is later, to exercise this option.

- Option 3: 90 days of attaining majority

There is no 90-day condition in the Act.

- Option 4: None of the above

Not correct, since option 2 fits the legal requirement.