Understanding Agricultural Marketing System:
- The correct components of an agricultural marketing system typically include assembling, storage, processing, grading, packaging, transportation, and distribution.
Evaluating the Options:
- (A), (C), and (D) correctly represent key functions of agricultural marketing.
- (B) is incorrect because "Production" is not a component of the marketing system; it belongs to the production process.
Conclusion:
Since production is not a part of agricultural marketing, the incorrect combination is \( \mathbf{(B)} \).