The correct answer is: Maharaja Ranbir Singh.
Maharaja Ranbir Singh was the second Dogra Maharaja of Jammu and Kashmir. He ruled from 1857 to 1885. During his reign, he built the Jhelum Valley Road and completed the Banihal Cart Road.
The Jhelum Valley Road is a 130-kilometer-long road that connects Srinagar to Banihal. It was built in the 1860s by Maharaja Ranbir Singh. The road is important for trade and tourism in Jammu and Kashmir.
The Banihal Cart Road is a 16-kilometer-long road that connects Banihal to Qazigund. It was built in the 1850s by Maharaja Ranbir Singh. The road is important for trade and tourism in Jammu and Kashmir.
Maharaja Gulab Singh was the first Dogra Maharaja of Jammu and Kashmir. He ruled from 1846 to 1857. He did not build the Jhelum Valley Road or the Banihal Cart Road.
Maharaja Pratap Singh was the third Dogra Maharaja of Jammu and Kashmir. He ruled from 1885 to 1925. He did not build the Jhelum Valley Road or the Banihal Cart Road.
Maharaja Hari Singh was the fourth and last Dogra Maharaja of Jammu and Kashmir. He ruled from 1925 to 1947. He did not build the Jhelum Valley Road or the Banihal Cart Road.