Identify the correct punctuation for the following: 'It was a cold, dark, and lonely night.'

1. ক
   It was a cold, dark, and lonely night.
   
2. খ
   It was a cold dark and lonely night.
   
3. গ
   It was a cold, dark and lonely night.
   
4. ঘ
   It was a cold, dark, and, lonely night.