Step 1: Understanding the question.
The question asks whether India has experienced abnormal monsoon this year, which requires information about both the factors affecting the monsoon and the actual occurrence of these factors.
Step 2: Analyzing the statements.
(I) El Nino phenomenon affects monsoon in India: This statement provides important background information. It indicates that the El Nino phenomenon has an impact on the monsoon, but it doesn’t tell us if it has actually affected this year’s monsoon.
(II) This year El Nino was active: This statement confirms that the specific El Nino phenomenon was active this year, which directly contributes to answering the question about abnormal monsoon.
Step 3: Conclusion.
Both statements are necessary to answer the question because statement I gives us the general effect of El Nino, and statement II tells us that El Nino was active this year. Together, they provide enough data to determine if India has experienced abnormal monsoon.