Topic: Miscellaneous (Others Question of English Grammer),

Best Answer Explained in Below-:

The phrase "He had ___ of fever" requires a descriptor that accurately conveys the intensity and clinical implications of the fever. Among the given options, "severe attack" (B) is the most suitable choice for a few reasons.

Firstly, the word "severe" is commonly used in medical terminology to indicate a serious or intense level of illness or symptoms. It implies a condition that may require immediate medical attention, which is appropriate in the context of fever that could potentially escalate to a significant health issue.

In contrast, while "strong" (A), "bad" (C), and "serious" (D) convey various levels of intensity, they do not align as precisely with the clinical context. "Strong" might imply vigor rather than severity, "bad" is vague and lacks specificity, and "serious" is more general without specifically addressing the severity of the attack.

Thus, "severe attack" effectively communicates both the gravity and the potential impact of the fever, making it the most appropriate choice for this context. This aligns with standard medical language and helps convey the urgency of the situation more accurately.