Answer:
B. Apathetic
Step-by-step explanation:
"Pleasant" describes something enjoyable, agreeable, or pleasing to the senses, while "disagreeable" refers to something unpleasant, displeasing, or causing discomfort or dissatisfaction. Therefore, the relationship in the first pair of words, "pleasant : disagreeable", is an antonym relationship, where the words have opposite meanings.
The word "emotional" refers to the state of being strongly affected by or expressing intense feelings, sentiments, or emotions. Therefore, we need to find a word that means the opposite of this to complete the second pair of words.
The word "passionate" refers to having or expressing intense emotions, strong enthusiasm, or fervent devotion toward a particular subject, activity, or cause.
The word "apathetic" describes a lack of interest or emotion, often manifesting as indifference.
The word "eager" describes a state of enthusiastic readiness or anticipation, often characterized by a strong desire or willingness to do something.
Therefore, the best word to complete the second pair of words is "apathetic", since this is the antonym of "emotional".