This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophageal disorders, Subject name: Pathology
A 60 year-old have prolonged history of tobacco chewing presented with symptoms of weight loss and dysphagia. Esophageal biopsy was taken from a projectile mass in the esophagus which is shown below. What is your likely diagnosis? 
Select and explain. 
A. Adenocarcinoma, B. Carcinoid tumor, C. Squamous cell carcinoma, D. Small cell cancer
C: Squamous cell carcinoma
Answer: C: Squamous cell carcinoma 
Explanation: - Esophageal biopsy shows Keratin pearls which is suggestive of squamous cell carcinoma. - MC esophageal carcinoma in india - Squamous cell carcinoma. - MC location of SCC - middle 1/3rd of esophagus Endoscopy showing Squamous cell carcinoma of esophagus Barium swallow showing apple core appearance of Squamous cell carcinoma of esophagus EXTRA EDGE: - MC esophageal cancer in developed countries like USA - Adenocarcinoma - MC location of adenocarcinoma - Lower 1/3rd of esophagus