Final answer:
The correct answer choice for the given question is c) C78.00.
Step-by-step explanation:
The correct answer choice for the given question is c) C78.00.
The ICD-10 code C78.00 represents a primary malignant neoplasm of the right lung. This code is used to indicate a diagnosis of lung cancer.
Since the patient in question has a past medical history significant for lung cancer and now has a pathological fracture of the left femur due to metastatic bone cancer, the appropriate ICD-10 code to capture the current condition would be C78.00.