Choose the appropriate phrase to fill in the blank:
I could see she was in a ________.

Brown study (Phrase)
English Meaning: absorbed in one's thoughts and not paying attention to anything else.
Bangla Meaning: তীব্র নিমগ্নতা বা বিমূর্ততা / আনমনা ভাব
Ex. Sentence: I could see she was in a brown study.
Bangla Meaning: আমি দেখতে পাচ্ছিলাম সে খুব আনমনা হয়ে আছে .

Source: Oxford Dictiionary, Cambridge Dictionary