Read each sentence to find out whether there is any grammatical mistake/error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is 'No error' the answer is 5). (Ignore errors of punctuation, if any)

Q:

When all the visible frequencies are present equally 1)/ the perceived colour 2)/ of the light is white 3) / and the spectrum is flat line. 4)/ No error 5)

• 1
  1
• 2
  2
• 3
  3
• 4
  4
• 5
  5