The temperature and pressure at which ice,liquid water,and water vapour can exist together are:

• A
  $0\,^\circ C, 1\, atm$
• B
  $2\,^\circ C, 4.7\, atm$
• C
  $0.01\,^\circ C, 4.58\, mm \, Hg$
• D
  $-2\,^\circ C, 4.7\, mm \, Hg$