ENT Preauricular sinus develops due to- A Faulty fusion between hillocks of 1st and 2nd pharyngeal arches B Chronic suppurative otitis media C Acute Parotitis D Lupus vulgaris 💡 Explanation Preauricular sinus develops due to- ✓ Correct Answer: A. Faulty fusion between hillocks of 1st and 2nd pharyngeal arches