Select the most appropriate option to fill in the blank.

They went to Ramnagar ______ boat and stayed there for the weekend.

The correct answer is "by".

 Key Points

• When we refer to modes of transport, we use the preposition "by" followed by the transport method.
• In this case, the suitable preposition before 'boat' would be 'by'. So, the correct sentence is 'They went to Ramnagar by boat and stayed there for the weekend.'
• The other options - 'with', 'in', 'from' are irrelevant in this context since they do not properly connect the action with the mode of transportation.
• To conclude, going to a place 'by' a mode of transport is the appropriate usage.

Therefore, the correct answer is 'Option 1'.