Select the correct sentence

I have a headache is correct but not listed making none correct. This question tests sentence structure knowledge. I have got headache lacks an article. I gets headache uses incorrect verb form. I got headache is past tense unsuitable for present. Understanding article and tense usage ensures grammatical accuracy. A headache requires the article a for correctness. Correct sentence structure enhances clarity in writing or speech. This construction is common in expressing ailments. Knowing the correct form is vital for professional or casual communication ensuring clear expression of health issues.