Which of the following statement is wrong regarding alkenes

• A

  ${\mathrm{C}}_4-{\mathrm{C}}_{16}$ are liquids

• B

  These are lighter than ${\mathrm{H}}_2\mathrm{O}$

• C

  The boiling points of cis isomers are higher than trans isomers

• D

  M.P. and B.P s increases with branches in alkenes