What was the real name of Chanakya?

Chanakya's real name was Vishnugupta, also referred to as Kautilya (from his famous work Arthashastra) and sometimes as Bishnu Gupta or Vishnu Gupta. 'Kautilya' is actually a patronymic or name derived from his gotra, not his birth name. However, Option B says 'Bishnu Gupta' which is an acceptable variant of Vishnugupta. Option A 'Kautilya' is also correct but as a secondary name. Given the options, Bishnu Gupta is acceptable.