The kind of rhyme that has been employed in the line "Once...weary" would be:
A). Internal Rhyme
"Internal rhyme" is described as the rhyme pattern in which each poet employs stressed syllables or rhyming words in the same single line.
In the given line from Allen Poe's from "The Raven," the words "dreary and weary" are employed in the same line which symbolizes theusage of Internal rhyme.