Institution: AGRANI BANK LTD Exam: Agrani bank Ltd - Senior Officer - 12.02.2010
Topic: Antonyms, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The word "lethargy" refers to a state of sluggishness, inactivity, or a lack of energy and enthusiasm. An antonym is a word that has the opposite meaning. In this case, we are looking for a term that conveys the opposite of lethargy.

Among the options provided, **B) vigor** stands out as the best antonym. "Vigor" denotes strength, energy, and a lively state, which directly counters the essence of lethargy. When someone is full of vigor, they exhibit enthusiasm, exertion, and an eagerness to engage in activities, contrasting sharply with the lack of motivation associated with lethargy.

The other options do not effectively capture this opposition. **A) toughness** relates to strength or durability but doesn’t necessarily convey energy or activity. **C) plainness** pertains to simplicity or lack of decoration and is not related to energy levels. **D) flexibility** involves adaptability and ease of bending but does not imply vitality or liveliness. Thus, "vigor" is the only choice that encapsulates the opposing concept of energy and enthusiasm effectively, making it the correct answer.