Choose the correct option to complete the sentence.

If he got up early in the morning, he _________ not have missed the train.

would

The correct answer is Option (3) - would

The correct answer is: "would" → "If he got up early in the morning, he would not have missed the train."

• The sentence is a third conditional, which refers to a hypothetical past situation that did not happen.
• The structure of the third conditional is:
  If + past perfect, subject + would have + past participle.
• Since "got up" is in the past tense, the correct verb to use is "would not have missed" to indicate a past hypothetical result.