Exactly one of these is true: Tanvir catches the early train, or Tanvir reaches the office by nine. If Tanvir reaches the office by nine, then Tanvir attends the morning meeting. In fact, Tanvir does not attend the morning meeting. Which of the following must be true?
Correct answer C. Tanvir catches the early train and Tanvir does not reach the office by nine.
Explanation
Since Tanvir does not attend the morning meeting, the conditional shows that Tanvir does not reach the office by nine. Exactly one of the first two facts is true, so Tanvir catches the early train.
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