How close can you park to another vehicle when parked parallel to the kerb?

• A. You must leave at least 1 metre front and back
  Explanation:

  "For other vehicles to be able to exit safely, leave a gap of at least one metre. It also reduces the risk of damage to your vehicle."
• B. You must leave at least 1.5 metres front and back
• C. You must leave at least 2 metres from the front only
• D. You must leave at least 3 metres front and back