Select the most appropriate option to fill in blank no. 1.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. frustrating.
"Frustrating" is correct because it describes a feeling of disappointment or annoyance when intentions to study are disrupted.
The other options (exciting, surprising, interesting) do not convey the sense of dissatisfaction related to being unable to concentrate.