try to identify the liquids by smell ask another student to identify the liquids ask the teacher how to dispose of the liquids continue the experiment with the unidentified liquids
I gave my students this multiple choice question: While performing an experiment involving four different clear liquids, a student forgets to label the test tubes. What should the student do?

Only one answer is correct among these 4 choices:
- try to identify the liquids by smell
- ask another student to identify the liquids
- ask the teacher how to dispose of the liquids
- continue the experiment with the unidentified liquids

Could you tell me which one is correct?

ask the teacher how to dispose of the liquids