Answer:
The couple is the first option.
Explanation:
In poetry, a couplet is a succession of two lines that rhyme with each other and present the same meter.
Out of the options given, the second one does not present rhyming lines, and the other two options - the third and the last ones - have more than just two lines, and the rhyming scheme is ABAB.
In the first option, however, the two lines have the same final sound and the same meter:
And yet by heaven, I think my love as rare
As any she belied with false compare
