Direction: In the following question, a passage consists of six sentences. The first and the sixth sentences are given in the beginning as S1 and S6. The middle four-sentence have been removed and jumbled up. These are labelled as P, Q, R, and S. You are required to find out the proper sequence for the four sentences and mark the correct option accordingly.

S1: The Bermuda Triangle occupies a disturbing and almost unbelievable place in the world's catalogue of unexplained mysteries.

S6: Until the very moment of their disappearance.

P: Without a single body or even a piece of wreckage from the vanishing planes or ships having been found.

Q: Many of the planes concerned have vanished while in normal radio contact with their base.

R: More than a hundred planes and ships have vanished in this area into the air since 1945.

S: And more than a thousand lives have been lost.

The proper sequence should be