Question: What is the mandatory requirement for validating 3GPP YANG modules using the pyang tool to ensure model correctness?
Option 1: Successfully running "pyang --strict" with no errors and removing all errors/warnings from "pyang --lint".
Option 2: Running "pyang --lint" without necessarily addressing the errors or warnings produced.
Option 3: Only executing "pyang --strict" with no errors, while ignoring "pyang --lint" checks.
Option 4: Optionally choosing between running "pyang --strict" or "pyang --lint" based on module complexity.
Explanation: To ensure model correctness, the strict validation ("pyang --strict") must be passed without errors for all 3GPP YANG modules. Additionally, addressing "pyang --lint" outputs is implied for thorough validation, making Option 1 the most comprehensive and correct approach in a telecom context where reliability and precision are paramount.