What is the Thai name for the northeastern dialect spoken by the majority in the Isan region?

• A Phasa Nuea
• B Phasa Isan ✓
• C Phasa Tai
• D Phasa Pak Klang

Phasa Isan is a group of Lao dialects spoken across the 20 provinces of northeastern Thailand, closely related to standard Lao rather than central Thai.