Step 1: Understanding the Concept:
This question tests knowledge of ber (Indian jujube) flowering time.
Step 2: Detailed Explanation:
Under subtropical conditions, ber (Ziziphus mauritiana) flowers during October to December.
This is the typical flowering period in North Indian subtropical regions.
Key points about ber phenology:
- Dormancy: Winter months (December-January).
- Flowering: October-December (under subtropical conditions).
- Fruit maturity: January-March (winter-spring).
- Harvesting: February-April.
Other flowering times:
- In tropical conditions, flowering may extend to January.
- In arid regions, flowering may start in August-September.
Thus, October-December is the typical flowering period for ber in subtropical conditions.
Step 3: Final Answer:
Thus, the time of flowering in ber under subtropical conditions is October-December, which corresponds to option (D).
[0.5cm]