The correct answer is option 1: Moscow and Vladivostok. The Trans-Siberian Railway is the longest railway line in the world, spanning over 9,000 kilometers. It connects Moscow, the capital of Russia, with Vladivostok, a major port city on the Pacific Ocean. Option 2 is incorrect because St. Petersburg is not one of the terminals for the Trans-Siberian Railway. Option 3 is incorrect because Krasnoyarsk is not one of the main terminals, although it is a significant city along the railway route. Option 4 is also incorrect because it combines St. Petersburg and Krasnoyarsk, neither of which are correct terminals for the Trans-Siberian Railway. Therefore, the correct answer is option 1, Moscow and Vladivostok.