Institution: Bangladesh Development Bank Exam: Bangladesh Development Bank Ltd - Officer - 28.03.2014
Topic: Sentence (বাক্য), Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The term "engrossed" means to be fully absorbed or immersed in an activity, to the extent that one may lose awareness of their surroundings. When someone is engrossed in an office routine, they are intensely focused and potentially unaware of other happenings or tasks.

Among the options provided, "lost" can be interpreted in a context where a person is so involved that they have momentarily 'lost' track of everything else around them, making it seem like they are absorbed or fully engaged.

Although “A) involved” and “C) fully occupied” also hint at a deep engagement, they do not convey the same notion of losing yourself in the task as effectively as "lost." "B) tired" does not fit at all, as it suggests a state of fatigue rather than being deeply engaged.

Thus, while "fully occupied" and "involved" are close, "lost" best captures the essence of being wholly engrossed in a task, reflecting that the person is potentially unaware of anything beyond that specific routine.