Concept:The underlined letters ch in arch are pronounced /tʃ/, the sound in church and chin.Solution:Say each option and listen to the sound at its end:A. splash ends in /ʃ/ (the "sh" sound, softer, with no "t" at the start)B. patch ends in /tʃ/ ✓ (the letters tch make the same sound as ch)C. path ends in /θ/ (the "th" sound in thin)D. spark ends in /k/Only "patch" has the /tʃ/ sound of "arch".Key point: /tʃ/ can be spelt ch or tch; do not confuse it with /ʃ/ (sh).Answer:Option B (patch)