(2) Completed in 2006, the Very Large Telescope (VLT) has four reflecting telescopes,8.2 m in diameter that can observe objects 4 billion times weaker than can normally be seen with the naked eye.
(1) It also has four movable auxiliary telescopes 1.8 m in diameter.
(4)When these are combined with the large telescopes, they produce what is called interferometry: a simulation of the power of a mirror 16 m in diameter and the resolution of a telescope of 200 m.
(3) This configuration enables one to distinguish an astronaut on the Moon.
So, the correct answer is (C): 2143
Sentence 2 initiates the discussion on VLT, while Option 4 delves deeper into the topic by focusing on telescopes. Sentence 4 & Sentence 3 naturally forms a cohesive unit as one presents the purpose and the other discusses their utilization.
Therefore, the correct sequence is option (C): 2143