What is the difference in reaction of alkene with $HBr$ in the presence of peroxide and in the absence of peroxide?

• A
  Presence of peroxide follows Markovnikov rule; absence follows Anti-Markovnikov rule.
• B
  Presence of peroxide follows Anti-Markovnikov rule; absence follows Markovnikov rule.
• C
  Both follow Markovnikov rule.
• D
  Both follow Anti-Markovnikov rule.