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'.
We have to always be on our guard to ensure the highest level of safety inside train operations .
We have to always be on our
guard to ensure the highest level
of safety inside train operations
No Error

Options

A. 1
B. 2
C. 3
D. 4

Answer

C