Q. They are designed to point to direction from which the wind is coming.
R. They are only wind-vanes.
S. This weather-vane often tops a church spire, tower or high building.
Right Answer is:
Statement S talks about weather-vane. Next should be statement P which introduces the object which is talked about in statement S. It should be followed by statement R which further describes them. Next should be statement Q which describes the purpose of their design.
Hence, the correct sequence is SPRQ.