5. S1 : In neighbouring Tamil Nadu, Kodaikanal has fallen on bad times.
S6 : It is still a source of water—albeit unpotable—for the thirsty Kodai.
P : Trouble started when the focus was shifted from Ooty to Kodai in the mid 80s.
Q : The once pristine surroundings have been destroyed by construction that paid scant respect to the ecological sensitivity of the area.
R : Commercial forces took over the hill station and large-scale building activities commenced around the artificial lake created in the 1800s.
S : There is large-scale deforestation as well.
The correct sequence should be :
- AP - S - Q - R
- BQ - R - P - S
- CQ - S - P - R
- DP - R - Q - S
Explanation
S1 states that Kodaikanal has fallen on bad times, and P gives the trigger: trouble started when the focus shifted from Ooty to Kodai in the mid-1980s. R describes the commercial takeover — large-scale building around the artificial lake created in the 1800s — Q shows the consequence (the pristine surroundings destroyed by construction ignoring ecological sensitivity), and S adds deforestation on top. S6 ends on the lake's remaining role: still a water source for Kodai, though unpotable. Hence P-R-Q-S.