Select the sentence with no spelling errors:

The correct answer is (b).
Explanation:
Option (b) has no spelling errors. The words in the other options have spelling mistakes such as "urjent" (should be "urgent"), "throuh" (should be "through"), "leting" (should be "letting"), "maters" (should be "matters"), "alrms" (should be "alarms"), and "ergent" (should be "urgent").
Correct sentence:
"We need to strike a balance between creating false alarms and letting any urgent medical matters fall through the cracks."