The error lies in part R of the question. Therefore, the correct answer is option 3. Whether and weather fall under the category of homophones - words with different spellings and meanings but similar pronunciation. Whether is a conjunction which means if. Example - I am not sure if/whether I will be attending the wedding ceremony. In its noun form, ‘weather’ means the atmosphere around us in terms of humidity, temperature, clouds. When used as a verb, it means erode/withstand The rope has weathered the surface of the rock (eroded) Check the weather outside – how can you think of jogging today? From the context of the sentence, weather has been used incorrectly. Correct sentence - The question that has bothered the employers is whether Employment Disputes can be settled through arbitration?