Which word/number would be at 4th to the left of '20' in Step-IV'?

Options

A. 40
B. 50
C. must
D. Students

Answer

A

Explanation

Input: 40 of must attend 30 60 80 regular school 70 students 20 class 50
Step I: students 40 of must attend 30 60 regular school 70 20 class 50 80
Step II: school students 40 of must attend 30 60 regular 20 class 50 80 70
Step III: regular school students 40 of must attend 30 20 class 50 80 70 60
Step IV: of Regular school students 40 must attend 30 20 class 80 70 60 50
Step V: must of regular school students attend 30 20 class 80 70 60 50 40
Step VI: class must of regular school students attend 20 80 70 60 50 40 30
Step VII: attend class must of regular school students 80 70 60 50 40 30 20