Directions: In the following questions, the 1st and the last part of the sentence/ passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R, and S. These four parts are not given in their proper order. Read the sentence/ passage and find out which of the four combinations is correct.

1. The paper has divided these so-called UFOs into two types: cosmic and phantom.

P. Ordinary photo and video recordings will also not capture the UFO.

Q. "The eye does not fix phenomena lasting less than one-tenth of a second," the Ukrainian researchers are quoted as saying in the study.

R. "It takes four-tenths of a second to recognize an event.

S. While cosmic appear as bright objects, the phantom completely absorbs all the light and is not visible.

6. To detect UAP, you need to fine-tune the equipment: shutter speed, frame rate, and dynamic range."