Four sentences are given, out of which three have all correct spellings. Choose the sentence with the incorrectly spelt word/words.

The correct answer is (c) I reckonned I wouldn't stay on hand till he got that chance.
Explanation:
The word "reckonned" is incorrectly spelled. The correct spelling is "reckoned."
Meanings of all options:
· Unlocked: Opened or unfastened a lock.
· Cleared: Removed or made free from obstruction.
· Reckoned: Considered or thought (correct spelling).
· Sprinkling: A small amount of something scattered or spread.
Correct sentence:
"I reckoned I wouldn't stay on hand till he got that chance."