Select the most appropriate option to fill in blank number 1.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. When.
The word "when" is the most appropriate choice because it introduces a specific point in time, linking the arrival of the letter to the events that follow.
It indicates that the letter came at a particular moment, triggering the subsequent actions (informing about Raka's mother and grandmother).