Spot the grammatical errors in the given sentence. Mark the part with error as your answer. If there is no error, mark "No error" as the answer. (Ignore punctuation error) Further trials have added weight on (a)/ these findings, and an expert panel concluded there was no evidence to (b)/ recommend beta-carotene supplement for the general (c)/ population and strong evidence to recommend that smokers avoid it. (d)/ No error (e)