Q1. Which of the following is the most common site of squamous cell carcinoma of the esophagus? A. Cervical esophagus B. Upper thoracic esophagus C. Middle thoracic esophagus D. Lower thoracic esophagus

• A. Cervical esophagus

• C. Middle thoracic esophagus

• B. Upper thoracic esophagus

• D. Lower thoracic esophagus

Q2. What type of cancer is most commonly associated with Barrett's esophagus? A. Adenocarcinoma B. Squamous cell carcinoma C. Lymphoma D. Sarcoma

• Neuroendocrine tumor

• A. Adenocarcinoma

• Carcinoid tumor

• Melanoma

Q3. In the TNM staging system, what does the 'N' stand for? A. Node B. Neoplasm C. Nerve D. Necrosis

• Nutrient

• A. Node

• Nucleus

• Nodule

Q4. Which treatment option is typically first-line for localized esophageal cancer? A. Chemotherapy B. Radiation therapy C. Surgical resection D. Immunotherapy

• Endoscopic resection

• Targeted therapy

• Palliative care

• C. Surgical resection

Q5. What is the primary risk factor for developing esophageal squamous cell carcinoma? A. Obesity B. Smoking C. Alcohol consumption D. All of the above

• D. All of the above

• Regular exercise

• High fiber diet

• Genetic predisposition