The correct answer is option 3, The Charter Act of 1813.

During the colonial period in India, the East India Company had established a monopoly on trade and governance. However, this monopoly was eventually put to an end through the Charter Acts passed by the British Parliament.

The Regulatory Act of 1773, also known as the Regulating Act, was an important legislation that was aimed at tightening the control of the British government over the East India Company. It introduced a system of dual control, with the establishment of a Board of Control in London to oversee the company`s affairs. However, this act did not specifically address the trade monopoly of the East India Company.

Pitt`s India Act of 1784, or the Act for the Better Government of India, was another significant legislation that reformed the East India Company`s administration. It created a Board of Commissioners for the Affairs of India in London and established the office of Governor-General in India. This act also did not directly address the trade monopoly.

The Charter Act of 1833, often referred to as the Saint Helena Act, further reformed the administration of the East India Company and increased government control. However, it was the Charter Act of 1813 that played a crucial role in ending the trade