The patient is being admitted for chemotherapy due to lung cancer. She underwent two rounds of chemotherapy before discharge. This is coded as ________.
1) Primary neoplasm of lung cancer, procedure for chemotherapy
2) Admission for chemotherapy (Z code), primary neoplasm lung cancer, and the procedure for chemotherapy
3) Admission for chemotherapy (Z code), procedure for chemotherapy Primary neoplasm Lung cancer
4) Admission for chemotherapy (Z code), procedure for chemotherapy