Question
In each of the following questions, a sentence is
divided into four parts (A), (B), (C) and (D), One of these parts may contain an error. Identify the part which contains the error, if there is no error, choose option (E) Policies designed to promote sustainable development (A) often fails to achieve desired outcomes (B) when economic, social, and environmental objectives (C) are not aligned coherently. (D) No error (E)Solution
Subject = Policies (plural). Correct verb: fail, not fails. This is a subject–verb agreement error.