Custom Field Types - Incrementing Record Identifiers

Question 1

Prestige Worldwide little pistol organizing their order management system. Each order should start with the prefix or a d followed by a six digit number, automatically incrementing by one, and be unique. What type of custom fuel type should be used to meet this requirement? Choose 1

A. Text field
B. Auto number field
C. Number field
D. roll up summary field

Answer 1

B