Concept:Trade promotion and protection is usually carried out by a national association coordinating chambers of commerce, industry, and agriculture.
Explanation:NACCIMA stands for the National Association of Chambers of Commerce, Industry, Mines and Agriculture.
Its major duty is to promote and protect trade, industry, and agriculture.
It carries out this duty by organising trade fairs and exhibitions.
The chamber of commerce mainly promotes local business interests rather than organising trade fairs directly.
Thus, the body responsible for this function is NACCIMA.
Answer:B. NACCIMA