Hey I only answered cause I need help so bye
These lines are:
<em>Parting is such sweet sorrow</em><em>That I shall say good night till it be morrow.
</em>Neither Romeo nor Juliet want this night to end because they don't want to leave each other's side. They want to stay together the entire night, but given that they are unable to, Juliet speaks those famous parting words, wishing to meet Romeo again in the morning.
You did not include options in your question, but based on the meaning of the word cryptic, your answer will be 'A HIDDEN MEANING'.
When you say that something is cryptic, it means that, that thing has a meaning that is mysterious or obscure.
From the way the word was used in the given sentence, it means that the message the teacher was passing across about the test is hidden, it was not understood by any of the students.