Identify the segment in the sentence, which contains the grammatical error.
We reserved tickets for a journey on train for the next morning for my sisters and me.

Correct option is A

The segment "for a journey on train" contains the grammatical error.
· The correct form should be "for a journey by train," using the preposition "by" to indicate travel via a particular method of transportation.
· Grammatical rule: The phrase "by train" is standard in English to describe the mode of transportation used.
· Example: We traveled by train from Paris to Lyon, smoothly using the correct preposition for travel modes.
Thus, the correct sentence should be: "We reserved tickets for a journey by train for the next morning for my sisters and me."