Which letter ends the grammatically correct sentence formed by the jumbled words: completely circles shade corresponding the?

To determine the correct letter that completes the grammatically correct sentence, we need to rearrange the given jumbled words: "completely circles shade corresponding the."

A valid rearrangement of these words is "The completely corresponding shade circles." This grammatical arrangement uses "the" as the subject article, followed by the adjective "completely," the verb "corresponding," and the nouns "shade" and "circles" to create a coherent sentence.

The last word of this structured sentence is "circles," which ends with the letter 'S.' As a result, the correct choice is the one that corresponds to the last letter of "circles."