Institution: Bangladesh Public Service Commission (BPSC) Exam: 17th BCS Preliminary Exam 1996
Topic: Idioms & Phrases, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The phrase "all in" typically conveys a sense of being overwhelmed or exhausted due to extensive effort, emotional investment, or trying circumstances. While it may seem that "all in" could refer to being fully prepared or committed in different contexts, the nuances of the expression often lean towards fatigue or exhaustion.

In situations where someone feels "all in," they might be describing a state where they have given their maximum effort, whether in work, personal challenges, or a competitive environment. This intense level of involvement often leads to feelings of tiredness both physically and emotionally. Thus, the phrase effectively communicates that the person feels spent or worn out, resonating with the first option, A) "He is very tired."

In contrast, the other options—B) "He has arrived," C) "He has finished packing," and D) "He has got everything"—fail to capture the deeper emotional state implied by "all in." Instead, they suggest readiness or completion, which does not align with the term’s common usage in expressing one's limits or exhaustion.