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Option 1: NH4
This option is incorrect as NH4 does not connect Uttar Pradesh and Tamil Nadu. NH4 is a national highway that runs between Chennai in Tamil Nadu and Thane in Maharashtra.
Option 2: NH5
This option is incorrect as well. NH5 does not connect Uttar Pradesh and Tamil Nadu. NH5 is a national highway that runs along the east coast of India, connecting Chennai in Tamil Nadu with Kolkata in West Bengal.
Option 3: NH6
This option is also incorrect. NH6 does not connect Uttar Pradesh and Tamil Nadu. NH6 is a national highway that runs between Hajira in Gujarat and Kolkata in West Bengal, passing through Maharashtra, Chhattisgarh, Jharkhand, and Odisha.
Option 4: NH7
This is the correct answer. NH7 is a national highway that connects Varanasi in Uttar Pradesh with Kanyakumari in Tamil Nadu. It is one of the longest national highways in India, spanning a distance of approximately 2,369 kilometers.
In summary, the correct answer is option 4 - NH7.