Directions: In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

He was a round little man (A) / with a red face and a hole box (B) / of tools with dials and wires. (C) / No error (D)

18, 25, 33, 42, 52, 63, ?

3              25           173         1041       5201       20809

800 400 600 1500 ? 23625

16, 8, 8, ?, 24, 60

21, 63, 315, ?, 19845, 218295

5 29 ? 569 1703 3401

13      26       78       ?      468      936

If 10 9 38 x 5428

Then, 2x² + 1 = ?

640 320 160 ? 40 20

12           8              6              12           4.5          15