Which of the following statements regarding upper GI involvement in corrosive poisoning is true

It has been found on endoscopy that,the involvement of the esophagus and stomach with acid ingestion is roughly It was previously thought that acids spare esophagus and mostly involve the stomach ,but this has been proven false with recent endoscopic findings Alkali ingestion causes more damage to the esophagus than to the stomach or duodenum Note:Acids causes more superficial injury ,due to eschar formation which prevents penetration of acid Alkali causes deeper injury reference:Rosens Emergency medicine .Concepts and clinical practice 9th edition pg 1890