In each question, the first and the last sentences of the passage are numbered S1 and S6 respectively. The rest of the passage is split into four parts. These four sentences are jumbled. Read the sentences and identify their correct and logical order.

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S1: Sun birds are among the smallest of Indian birds.
P : Though they are functionally similar to the humming birds of the New World, they are totally unrelated.
Q : They do eat insects too.
R : They are also some of the most brilliantly coloured birds.
S : sun birds feed on nectar mostly and helped in pollination.
S6: Our common sun birds are the purple sun bird, the glossy black species and purple rumped sun bird, the yellow and maroon species.
The Proper sequence should be: