S1: Calcutta unlike other cities kepts its trams. P: As a result there horrendous congestion. Q: It was going to be the first in South Asia. R: They run down the centre of the road S: To ease in the city decided to build an underground railway line. S6: The foundation stone was laid in 1972. The Proper sequence should be:

1. A Option A: PRSQ
2. B Option B: PSQR
3. C Option C: SQRP
4. D Option D: RPSQ

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