Identify the error in the following sentence: (a) The opening batsman was famous (b) for the imperial stokes (c) he played on the cricket field. (d) No error.

The error is in part (b). The word 'stokes' (the act of stoking a fire) is incorrect in this cricketing context. The correct word is 'strokes', referring to the shots played by a batsman. Additionally, 'imperial' (relating to an empire) is contextually odd; 'imperious' or 'imperial-looking' might be intended, but the clear spotting error is the missing 'r' in 'strokes'. Parts (a) and (c) are correct.