Q: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Question: One patient is diagnosed with a 4 cm lung cancer without pleural contact in the right upper lobe. The extension study reveals the presence of metastasis in right parahilar nodes, without evidence of distant metastasis. The staging of the tumor will be:
Options: <1> Stage I. <2> Stage IIA. <3> Stage IIB. <4> Stage IIIA. <5> Stage IIIB.
A:
2