Correct option is A
Grammar Rule:
1.
Interrogative Sentence Transformation:
·
"Does" is removed in indirect speech.
· The verb
"arrive" (Present Simple) changes to "arrived" (Past Simple).
2.
Incorrect
· "She asked about the train" (Too vague).
· "When will the train arrive she asked" (
Incorrect word order).
· "She said when does the train arrive" (
Incorrect question format).
Correct Sentence: "She enquired at what time the train arrived."