Which of the following best describes the semantic concept of 'Exocentricity' in compound words?

1. ক
   The meaning is determined by the head of the compound
   
2. খ
   The meaning is not derived from the literal meaning of its components
   
3. গ
   The compound has two heads with equal semantic weight
   
4. ঘ
   The compound functions as a synonym for its constituents