Concept:The word 'rapturous' means feeling or expressing intense delight.
Explanation:First, understand the core meaning of the given word.
'Rapturous' is an adjective that describes a state of extreme joy, pleasure, or enthusiasm.
For instance, a rapturous reception is one filled with great excitement and happiness.
Now compare each option to find the closest match.
Option A: Anxious means worried or nervous, which is the opposite of joyful.
Option C: Concealed means hidden or kept secret, which is unrelated to emotion.
Option D: Agitated means upset or disturbed, which also does not fit.
Option B: Delighted means filled with great pleasure or happiness.
Since both 'rapturous' and 'delighted' express strong positive emotion, they are synonyms.
Hence, the correct synonym among the given options is 'delighted'.
Answer:B. Delighted