In the question given below, the passage consists of six sentences. The first and sixth sentences are given at the beginning. The middle four sentences have been removed and jumbled up. They are labelled as, P, Q, R, and S. Find out the proper order for the four sentences.
S1: This weather-vane often tops a church spire, tower, or high building.
P: They are only wind-vanes.
Q: Neither can alone tell us what the weather will be.
R: They are designed to point to direction from
which the wind is coming.
S: Just as the barometer only tells us the pressure of air, the weather-vane. tells us the direction of the wind.
S6: The weather-vane can, however, give us some indication of the other.
The proper sequence should be