Well, judging on the words you gave, I'd have to say B. Thou and Know. I'm only basing this on my memory, so I could be wrong! I hope I gave you some help!
Slant rhyme is one of the major poetic devices. It is also called an “imperfect rhyme”, “near rhyme,” or “oblique rhyme. It can be defined as a rhyme in which the stressed syllables of ending consonants match, however the preceding vowel sounds do not match. So in the given options Ride and Tide are considered as slant rhymes.
