Step 1: Analyze Inference I:
- The total mango exports reduced by 30%.
- This does not directly imply that the total production of mangoes decreased. It could be due to factors like market demand, transportation issues, etc.
Conclusion: Inference I does not follow.
Step 2: Analyze Inference II:
- The statement only discusses mango exports, but does not mention anything about the quality of the mangoes exported.
Conclusion: Inference II does not follow.
Final Conclusion: Neither inference I nor inference II can be directly inferred from the given statement.