A 70- year-old smokers presents with a 3-month h/o dysphagia and weight loss. Flexible nasoendoscopy shows pooling of saliva in the pyriform fossae, with restricted mobility of the right hemi-larynx. Malignancy is suspected. At surgery, you find that he has a 3 cm tumour affecting the right pyriform fossa and extending into post-cricoid region. According to the TMN staging, what T- stage is this malignancy?