Select the correct answer based on the context of the sentence.
He was very frustrated because all his efforts in the kitchen had gone ______.
He was very frustrated because all his efforts in the kitchen had gone in vain.
Complete the following task based on the instruction and optional input provided.### Instruction:
Select the correct answer based on the context of the sentence.

### Input:
He was very frustrated because all his efforts in the kitchen had gone ______.

### Output:
He was very frustrated because all his efforts in the kitchen had gone in vain.