Which statement most accurately describes Vocal-cord palsy?

A. A malignant tumour arising in the nasopharynx, sometimes presenting with neck nodes or ear symptoms. B. A disorder with episodic vertigo, fluctuating hearing loss, tinnitus and aural fullness. C. Inflammation of the external auditory canal, often painful with tragal movement. D. Impaired movement of a vocal fold due to nerve or muscle dysfunction.