S1: National highways connect one state with another and are of national importance. S6: These road systems are also known as primary road systems and are laid and operated under the supervision of the National Highway Authority of India. P: They are important because whereas they constitute merely two per cent of the total road networks, they nevertheless carry 40 per cent of the total road traffic. Q: The road infrastructure of the country is therefore crucial, and their construction and maintenance is of critical importance. R: They bear the load of traffic because these roads connect long distances and pass through major cities and towns. S: Since they cover the length and breadth of the nation and connect cities and towns, these highways are the primary facilitators of trade and connectivity.
A.PRSQ✓ Correct
B.SPQR
C.PRQS
D.SQRP
Explanation
The correct sequence is P-R-S-Q. After S1 introduces national highways, P explains their importance (2% of networks but 40% of traffic). R follows by explaining why they bear such load (they connect long distances and major cities). S extends this by noting they facilitate trade and connectivity across the nation. Q concludes by stating the road infrastructure is therefore crucial and needs proper construction and maintenance, leading naturally to S6 about NHAI supervision.
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