Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.

Ganeshwar is located near the copper mines of the Sikar-Jhunjhunu area of the Khetri copper belt in Rajasthan. The Ganeshwar-Jodhpura culture has over 80 other sites currently identified. The period was estimated to be 2500–2000 BC. Historian Ratna Chandra Agrawala wrote that Ganeshwar was excavated in 1977.

The letter 'E'. As of the above given data, It is in the 1st place in Earth, 2nd in Heaven and in the middle of the Sea. It appears once in a Year and twice in a Week. It is present in February, June, September, October, November & December. But not in the Month.   Hence, it is the letter 'E'.

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.