In this sectences is given . The sentences are indicated in three separate parts and each one is labelled (a), (b) and (c) . Read each sentences to find out whether there is ab error in any part ./ NO sentence has more than one error . When you find an error in any one of the parts(a) , (b) or (c) . indicates your response on the seprate answer sheet at the appropriate space. You may feel that there is no error ina sentence in that case, letter(d) will signify a 'No error' response.
`("The speaker stressed repeatedly on")/a` `("the importance of improving")/b` `("the condition of the slums")/c` `("No error")/d`.

Explanation

(a) Replace .on. by .over.