The oldest bridge in Himachal Pradesh is the Slapper Bridge. It is a suspension bridge that was built in 1889. The bridge is located in the Kullu district of Himachal Pradesh. It is a popular tourist destination.
The Dehra Gopipur Bridge is a railway bridge that was built in 1903. The bridge is located in the Bilaspur district of Himachal Pradesh. It is a major railway bridge that connects the northern and southern parts of Himachal Pradesh.
The Victoria Bridge is a road bridge that was built in 1905. The bridge is located in the Shimla district of Himachal Pradesh. It is a popular tourist destination.
The Wangtu Bridge is a road bridge that was built in 1910. The bridge is located in the Kinnaur district of Himachal Pradesh. It is a major road bridge that connects the Kinnaur district with the rest of Himachal Pradesh.
Therefore, the correct answer is A.