FIA

The arithmetic mean of two numbers is their sum divided by 2. Here, (x-3 + x+3)/2 = (2x)/2 = x, so the mean is x.

The northern end of the Pakistani side of the China-Pakistan Economic Corridor (CPEC) is the Khunjerab Pass, which connects Pakistan with China. This pass is the highest paved international border crossing in the world and serves as the gateway for CPEC in the north.

The computer depreciates by 10% annually, so after one year its value is 90% of 100,000 = 90,000. After the second year, it is 90% of 90,000 = 81,000. Therefore, the value after two years is Rs. 81,000.

Ketanji Brown Jackson is the first Black woman confirmed as a justice to the United States Supreme Court, making option C correct. Clarence Thomas and Thurgood Marshall are male justices, so options A and B are incorrect.

The Pakistan Special Police Establishment was established in 1962 to investigate corruption and other special crimes. Options A and B are incorrect as the establishment did not exist in those years, and option D is incorrect because 1962 is the correct year.

Bamboo is a member of the grass family (Poaceae). It is a giant grass, not a weed or herb, so option C is correct.

The ASEAN Summit 2020 was hosted by Vietnam and conducted via video conferencing due to the COVID-19 pandemic. Therefore, Vietnam is the correct answer.

Mexico is the country directly south of the United States of America, sharing a long border with it. Panama and Canada do not border the USA to the south, and "None of these" is incorrect.

The word 'Argosy' refers to a large merchant ship or a fleet of such ships, especially those used for trading. Therefore, option B is correct.

Under the FIA Act, a person arrested can be detained either at a police station set up by the police or at any place declared as a police station by the authorities. Therefore, both options A and B are correct, making option C the right choice.