Complete the sentence by using the suitable idiom/phrase from the following options:

Harry boasted about scoring the highest marks in his class but when he saw the results, he had to _____.

eat the humble pie

The correct answer is Option (2) → eat the humble pie

• "Eat the humble pie" means to admit one's mistake and accept humiliation.
• In the sentence, Harry boasted about scoring the highest, but when he saw the real results (which likely proved him wrong), he had to accept his mistake and feel embarrassed.

OTHER OPTIONS

• "Cut the mustard"  → Means to meet expectations or succeed, which does not fit the context.
• "Full of beans"  → Means to be energetic and lively, which is unrelated here.
• "Finger in every pie"  → Means to be involved in many activities, which does not match the situation.

Thus, the correct sentence is: "Harry boasted about scoring the highest marks in his class, but when he saw the results, he had to eat the humble pie."