Consider the following statements : 1. No virus can survive in ocean waters. 2. No virus can infect bacteria. 3. No virus can change the cellular transcriptional activity in host cells. How many of the statements given above are correct?

Option (d) is correct because all three statements are factually false: viruses are the most abundant biological entities in the ocean, bacteriophages are a well-known class of viruses that specifically infect bacteria, and viral replication fundamentally depends on hijacking and altering host cellular transcriptional activity. Option (a) might be tempting if a candidate underestimates the vast ecological range of viruses, but the use of absolute "No" qualifiers makes each statement scientifically inaccurate. The core concept being tested is the fundamental biology of viruses, specifically their ecological distribution, host range, and mechanisms of replication.