A patient presents with carcinoma of the larynx involving the left false cords, left arytenoid and the left aryepiglottic folds with bilateral mobile true cords. Treatment of choice is -
Vertical hemilaryngectomy
Horizontal partial hemilaryngectomy
Total laryngectomy
Radiotherapy followed by chemotherapy
In the Patient

Involvement of unilateral false cord, aryepiglottic folds and arytenoids with mobile cord suggest supraglottic cancer in T2 stage (morem than one subsites of supraglottis are involved).
For T2 stage radiotherpy is best. But it is not given in options. Hence we will go for voice conserving surgery-vertical hemilaryngectomy.
Vertical hemilaryngectomy means excision of one half of larynx, one half of supraglottis, glottis and subglottis.