Choose the correct option:
He ____ not wait for us.

1. "need" - As a semi-modal verb, "need" can function similarly to modal verbs in negative and interrogative sentences, particularly in British English. In this context, if the sentence is interpreted as informal or colloquial, especially in British English, "need" can be used without "s" even though it's paired with a third person singular subject. This usage is less common and more informal than standard constructions, but it can occur in phrases like "He need not wait for us," implying "He doesn't have to wait for us."

2. "needs" - This would be the standard conjugation for "need" in the present simple tense with a third person singular subject in a formal or more conventional context. In this case, "He needs not wait for us" would be grammatically unusual.

3. "do not need" - This option is not correct because it uses the first person plural negative construction with "do not," which is incongruent with the third person singular subject "He."

4. "None of these" - If "need" is accepted as correct under the specific informal or colloquial usage in British English, then this option is incorrect.