Identify the error: One of my friend is a surgeon.

  • A. One should be Ones
  • B. friend should be friends
  • C. is should be are
  • D. There is no error

Explanation

The phrase one of must be followed by a plural noun, since it selects a single member from a group, so it should read one of my friends. The verb stays singular because the subject is one, which is why is is correct. Both halves of this construction are tested together very often.

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