To solve the problem of matching the year of enactment with the corresponding legislation, we'll analyze each provided option and identify the legislation that was enacted in each respective year.

1. 1833: This year is significant for the Abolition of Slavery. The \(Slavery Abolition Act\) was enacted in 1833, which abolished slavery throughout the British Empire. Although the specific Act mentioned isn't called "Abolition of Slavery," the year aligns with this major legal change. Therefore, 1833 matches with (II) Abolition of Slavery.
2. 1986: The Child Labour (Prohibition and Regulation) Act was enacted in this year in India to prohibit the employment of children in certain occupations and to regulate the conditions of work in others. Hence, 1986 corresponds to (IV) Child Labour (Prohibition and Regulation) Act.
3. 1948: This marks the enactment of the Factories Act, a major labor law regarding safety, health, and welfare of workers. Therefore, 1948 matches with (III) Factories Act.
4. 1856: The Hindu Widow Remarriage Act was enacted in this year, which legalized the remarriage of Hindu widows. Hence, 1856 corresponds to (I) Hindu Widow Remarriage Act.

Thus, the correct matching of years with legislation is:

• (A) 1833: (II) Abolition of Slavery
• (B) 1986: (IV) Child Labour (Prohibition and Regulation) Act
• (C) 1948: (III) Factories Act
• (D) 1856: (I) Hindu Widow Remarriage Act

This aligns with the correct answer: (A)-(II), (B)-(IV), (C)-(III), (D)-(I).