Institution: Bangladesh Bank Exam: Officer (General) |-Sonali | Janata | Bangladesh Krishi_Bangladesh Development bank ২৪.০৫.২০১৯ ||
Topic: English literature, Subject: English Grammar (ইংরেজি গ্রামার)

Best Answer Explained in Below-:

The correct answer to the question, "----- it was a holiday, the doctor performed the emergency surgery on the heart patient," is C) Although. This word is used to introduce a contrast or an exception to the statement that follows, which is essential for conveying the unexpected nature of the situation.

In this context, "Although" indicates that the doctor performed the emergency surgery despite it being a holiday, underscoring the doctor's commitment and professionalism. The use of "Although" suggests an implied challenge or a hurdle—the holiday typically signifies a time of rest or leisure when many professionals, including doctors, might be off work. Hence, the doctor's decision to perform surgery during this time is noteworthy.

On the other hand, if we consider the other options: "During" would suggest timing without conveying the contrast; "Even" is not grammatically suited for this context; and "So" implies causation, which doesn't fit because the holiday doesn't cause the surgery. Therefore, "Although" is the only option that accurately captures the unexpected nature of the doctor's actions in the context provided.