Final Answer:
The negation of the statement that Math is the best subject is (a). Therefore the final answer is (a) Math is not the best subject.
Step-by-step explanation:
To find the negation of the statement "Math is the best subject," we need to express the opposite sentiment. The negation would be a statement that denies the claim that math is the best subject. Among the options provided, (a) "Math is not the best subject" accurately captures the negation of the original statement. This choice directly opposes the assertion that math holds the top position among all subjects.
It's important to note that the other options introduce different sentiments. Option (b) suggests that math is the worst subject, option (c) states that math is an average subject, and option (d) claims that math is a difficult subject. While these statements may reflect varying opinions about math, they do not precisely negate the claim that math is the best subject.
In conclusion, (a) "Math is not the best subject" is the correct negation, as it appropriately contradicts the original assertion without introducing new judgments about the quality of math compared to other subjects. Therefore the final answer is (a) Math is not the best subject.