Question: In GSM, what file type identifier is used to identify Elementary Files that are directly under a Dedicated File?
Option 1: 2F - Master File Elementary Files
Option 2: 7F - Dedicated Files
Option 3: 6F - Dedicated File Elementary Files
Option 4: 3F - Master File Identifier
Explanation: In the context of GSM file structure, Elementary Files under a Dedicated File are specifically identified using a unique file type identifier. According to GSM conformance requirements, `6F` is designated for identifying Elementary Files that are nested under a Dedicated File (`7F`). This distinction is crucial for accurate navigation and access within the SIM's file system.