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.
Tesla designed system for sending electricity over the air through a series of enormous towers.

Options

A. for sending electricity
B. Tesla designed system
C. through a series of enormous towers
D. over the air

Answer

B

Explanation

Article Ashows that the noun is indefinite, referring to any member of a group. In the given question, .a. will be used for the system of sending electricity. Hence, .tesla designed a system will be answer.