The following sentences form a paragraph. The sentences are numbered as P, Q, R, S and T. These five parts are not given in proper order. Read the sentences and choose the alternative that arranges them in correct order.

P. What they saw was a great ape that had lived in splendid isolation for 700,000 years

Q. In 2017, the Tapanuli orangutan was recognized as a new species

R. One day 23 years ago, scientists were exploring a lost world called Batang Toru 

S. With its kindly black face, orange fur and vast proto-artisanal beard, it looked like the familiar Sumatran or Borneo orangutans but was neither

T.  Suddenly they glimpsed something moving in the forest canopy