Which of the Following Forms of Tracheoesophageal Fistula and Esophageal

Which of the following forms of tracheoesophageal fistula and esophageal atresia is most common?

A) Blind-ending upper esophageal pouch of variable length associated with a fistula from the lower trachea or main stem bronchi leading into the distal esophagus
B) An isolated esophageal atresia with a proximal blind-ending pouch and a "long gap" of missing esophagus above a small distal esophageal pouch
C) An esophageal atresia with a proximal and distal tracheoesophageal fistula
D) An isolated tracheoesophageal fistula presenting without atresia and usually occurring in the lower cervical or upper thoracic area