In a mixture of $A$ and $B$ components,the solution shows negative deviation when:

• A
  $A-B$ interaction is weaker than $A-A$ and $B-B$ interaction
• B
  $A-B$ interaction is stronger than $A-A$ and $B-B$ interaction
• C
  $\Delta V_{mix} > 0, \Delta S_{mix} > 0$
• D
  $\Delta V_{mix} = 0, \Delta S_{mix} = 0$