The San Francisco Conference, also known as the United Nations Conference on International Organization, was held in 1945. During this conference, the final approval and adoption of the United Nations Charter occurred. Delegates from various countries gathered in San Francisco to establish the UN, and the charter, which serves as the foundational document of the organization, was signed on June 26, 1945. This marked a significant step in the post-World War II efforts to promote international cooperation, peace, and security.

The San Francisco Conference, officially known as the United Nations Conference on International Organization, took place from April 25 to June 26, 1945. Therefore, the correct answer is:

(D) 25 April 1945

Coimbatore is called the 'Manchester of South India'. The city is located in the state of Tamil Nadu. The city has a major production and economy in the textile industry. The textile industry gives the major production which is surrounded by the cotton fields in neighbouring villages.