The following six sentences come from a paragraph. The first and the last sentence are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1 - The lion used to be very widely distributed in Africa and Asia.
S6 - No hunting is permitted in such reserved areas.
P - There are special forest zones set aside for wildlife in various countries.
Q - Indiscriminate killing by hunters has been the cause of this drastic fall in their numbers.
R - Today they are a relatively rare species.
S - If the species survives at all, it will be only in national parks.
The correct sequence should be: