Cancer LarynxMost common histological type of laryngeal Ca - Squamous cell carcinoma (seen in 90% cases) It is more common in males Male: Female ratio is 4: 1) (option a is incorrect) Most common age = 60-70 years.Mnemonic Aetiology: Risk factors:- Mnemonic “CA LARGES” C – Chronic laryngitis A – Alcohol L – Leukoplakia A – Asbestosis R – Radiation G – Mustard Gas E – Exposure to petroleum products S – Smoking Prognosis of Laryngeal CancerCure for larynx cancer, defined as 5 year disease free survival is generally better than for other primary site tumors of the aerodigestive tract. This reflects the prevalence of primary glottic tumors over supraglottic tumors and the early age at which glottic tumours are diagnosed (Hence option d is incorrect) So option a and d are both incorrect but if one option is to be chosen, go for option ‘a’.