The correct answer is D. He advised his son that he should not smoke.
The other options are incorrect because they do not accurately reflect the meaning of the sentence. Option A, “He advised his son do not smoke,” is incorrect because it uses the imperative mood, which is used to give commands. The sentence is not a command, but rather a statement of advice. Option B, “He advised his son to not smoke,” is incorrect because it uses the infinitive form of the verb “to smoke.” The infinitive form is used to express purpose or intention, but the sentence does not express either of these things. Option C, “He advised his son not to smoke,” is incorrect because it uses the negative form of the verb “to smoke.” The sentence does not express a negative command, but rather a positive statement of advice.
The sentence “He said to his son, ‘Do not smoke'” can be paraphrased as “He advised his son that he should not smoke.” This paraphrase accurately reflects the meaning of the sentence, which is that the father is giving his son advice not to smoke.