Explanation:

- Miniratna Category-I status is granted to profit-making public sector enterprises in India with financial autonomy.

- These companies can invest up to a certain limit without seeking government permission.

- Companies under this category exhibit strong financial performances and have fulfilled specific criteria over three years.

- Option 1, 55: Suggests there are 55 Miniratna Category-I companies.

- Option 2, 56: Suggests a total of 56 such enterprises.

- Option 3, 59: Proposes that 59 companies hold Miniratna Category-I status.

- Option 4, 47: Indicates only 47 companies are in this category.

The correct answer is Option 3, 59.