High Density Planting (HDP) is a modern farming technique where a higher number of plants are accommodated in a unit area compared to traditional methods. For banana cultivation, HDP usually involves closer spacing, such as $1.2m \times 1.2m$ or $1.5m \times 1.5m$, which significantly increases the plant population per hectare.
Step 1: Understand standard vs. high density.
Traditional banana planting usually accommodates about 1,500 to 2,500 plants per hectare. High density planting seeks to double or triple this number to maximize yield per unit area.
Step 2: Evaluate the numbers.
While the exact number can vary based on the specific spacing (e.g., triangular vs. rectangular), a common standard for "high density" in many commercial banana varieties is approximately 5,000 plants per hectare.
Step 3: Conclusion.
Option (B) represents the standard approximate value used in agricultural examinations for high density banana populations. Hence, the correct answer is (B).
Final Answer:
\[
\boxed{(B) \, 5000}
\]