Which quotation from a Shakespearean sonnet is a couplet?

Question

“And yet by heaven, I think my love as rare, / As any she belied with false compare.”
“Where art thou, Muse, that thou forget'st so long / To speak of that which gives thee all thy might?”
“Rise, resty Muse, my love's sweet face survey, / If Time have any wrinkle graven there; / If any, be a satire to decay, / And make Time's spoils despised every where.”
“My mistress' eyes are nothing like the sun; / Coral is far more red, than her lips red: / If snow be white, why then her breasts are dun; / If hairs be wires, black wires grow on her head.”

Answer 1

The quotation that contains a couplet is:

“And yet by heaven, I think my love as rare, / As any she belied with false compare.”

A couplet consists of two consecutive lines of poetry that typically rhyme and have the same meter. In this case, the two lines end with "rare" and "compare," which rhyme, making it a couplet.