The correct option is A. Both the statements I and II are effects of independent causes.

Explanation:

• Statement I: The meteorological department predicts deficient rainfall during monsoon season.
  This statement describes a natural phenomenon, specifically a weather prediction related to monsoon rainfall.
  The causes for deficient rainfall are typically natural factors like El Niño, ocean temperatures, atmospheric pressure systems, etc.
• Statement II: The GDP growth estimates have been revised downwards by the government.
  This statement describes an economic event, specifically a revision in economic growth estimates.
  The causes for such a revision are typically economic factors like global economic slowdowns, changes in government policies, industrial output, investment levels, etc.

While a severe drought (resulting from deficient rainfall) can impact agricultural output and, consequently, the overall GDP,
the initial prediction of deficient rainfall and the revision of GDP growth estimates are distinct events driven by different primary causes.

The prediction of deficient rainfall is a meteorological phenomenon, while the revision of GDP estimates is an economic assessment based on various economic indicators.
They are not directly caused by each other in a cause-and-effect relationship where one directly leads to the other as its sole or primary cause.
They are both effects, but of independent causal chains.