Question :
Find out the erroneous part:
He was taken by police; this happens when he was driving after having been heavily drunk.
Option 1: No error
Option 2: this happens when he was driving
Option 3: been heavily drunk.
Option 4: after having
Option 5: He was taken by police
Correct Answer: this happens when he was driving
Solution : Happens should be replaced with happened. The sentence is in past tense.