The adulterant used in turmeric powder is
Metanil yellow
The correct answer is D.
Explanation of correct option:
Explanation of incorrect options:
Option A:
Tamarind seed is used as an adulterant in coffee powder.
Option B:
Yellow sawdust is used as an adulterant in tea powder.
Option C:
Talcum powder is used as an adulterant in wheat flour.
Final answer: The adulterant used in turmeric powder is metanil yellow.