The answer is: B. Pleased
Astonished, astounded, and flabbergasted all mean to be surprised or amazed. Pleased, on the other hand, means to be happy or content.
Astonished is the most general of the four words. It can be used to describe any kind of surprise, from mild surprise to shock. Astounded is similar to astonished, but it suggests a greater degree of surprise. Flabbergasted is the strongest of the four words, and it suggests that someone is so surprised that they are almost unable to speak or move.
Pleased is a positive emotion that is associated with happiness and contentment. It can be used to describe a wide range of experiences, from enjoying a good meal to being happy with one’s life.
In the context of the question, the word “pleased” is the odd one out because it is the only word that does not describe a state of surprise or amazement. The other three words all suggest that someone is surprised or amazed by something.