Explanation:

Recently, the Assam government has inaugurated a 1.8-km ropeway across the Brahmaputra river, and described it as India’s longest river ropeway.

• Connecting Kachari Ghat (Guwahati) to Dol Govinda Temple on the northern bank, the ropeway passed the famous Umananda temple on a small island.
• The ropeway uses a “twin-track, single-haul, bi-cable double reversible jig back” system. The ropeway comprises two cabins — each with a capacity of 30 passengers plus one operator.
• The ropeway cuts travel time between the two banks to 8 minutes. The current travel options between the two banks are by ferry (30 minutes or more) or by road through a bridge that usually takes over an hour in the traffic.
• Apart from substantially reducing travel time, the ropeway will provide a breathtaking view of the mighty Brahmaputra and promote tourism in the State.

Hence option 4th is correct.