Topic: Antonyms, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The term "frugal" refers to a careful and prudent approach to managing resources, particularly money. It embodies qualities such as thriftiness and moderation in spending, often aimed at maximizing value and minimizing waste. In contrast, the word "extravagant" signifies a lavish and excessive expenditure, where resources are used freely and often carelessly, without regard for future needs or savings.

When assessing the given options, “Economical” (B) and “Spendthrift” (D) are not suitable antonyms. “Economical” implies a similar sense of careful spending, while “Spendthrift” refers to someone who spends excessively but doesn’t quite capture the opposite of "frugal" in a direct sense, as it does not inherently suggest lavishness.

“Extraordinary” (A) is also unrelated as it deals with something remarkable or unusual, rather than directly opposing the concept of frugality.

Thus, “extravagant” (C) stands out as the correct antonym. It directly contrasts with frugality, representing behavior characterized by excessive spending and lack of restraint, highlighting a fundamental difference in attitudes towards resource management.