Institution: Bangladesh Development Bank Exam: Bangladesh Development Bank Ltd - Officer (Cash) - 15.01.2016
Topic: Sentence (বাক্য), Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct answer to the question is **C) raconteur**. A raconteur is a person skilled in telling stories, particularly in an entertaining and engaging manner, which aligns perfectly with the context of the sentence. By stating that Humayun Ahmed "excelled at telling stories that fascinated his readers," the sentence emphasizes his storytelling abilities, making "raconteur" the most appropriate choice.

The other options do not fit the given context:

- **A) Braggart** refers to a person who boasts about achievements or abilities, which does not relate to storytelling.
- **B) Dilettante** describes someone who takes up an art or subject in a superficial manner, lacking deep understanding or commitment, thus failing to capture the essence of a storyteller.
- **D) Prevaricator** refers to someone who speaks or acts in an evasive way, often associated with dishonesty. This conveys a negative connotation that contradicts the notion of skillful storytelling.

Therefore, the term "raconteur" directly reflects Humayun Ahmed's talent and the positive impact of his storytelling on his audience.