If this be error and upon me proved, I never writ, nor no man ever loved.

These lines are an example of an
a.quatrian b octet c couplet d sestet

please help lost on this test

You cannot look at this the way you've typed it. You need to look at it in the original poem:

SONNET 116

Let me not to the marriage of true minds
Admit impediments. Love is not love
Which alters when it alteration finds,
Or bends with the remover to remove:
O no! it is an ever-fixed mark
That looks on tempests and is never shaken;
It is the star to every wandering bark,
Whose worth's unknown, although his height be taken.
Love's not Time's fool, though rosy lips and cheeks
Within his bending sickle's compass come:
Love alters not with his brief hours and weeks,
But bears it out even to the edge of doom.
If this be error and upon me proved,
I never writ, nor no man ever loved.

http://www.shakespeare-online.com/sonnets/116.html

Now look up these words at http://www.answers.com --

quatrain (watch the spelling)
octet
couplet
sestet

Let me know what you decide.

To determine the correct answer, we need to understand the structure of the lines provided.

In this case, the given lines consist of two lines or two verses. The fact that there are only two lines suggests that they belong to a specific type of poem, known as a couplet.

A couplet is a pair of lines in a poem that usually share the same meter and rhyme scheme. In this example, these two lines form a couplet because they are a self-contained unit expressing a complete thought.

Therefore, the correct answer to the question is c) couplet.