Identify the correct statements from the following:
$I$) Isotopes of an element show different chemical behaviour
$II$) Lyman series of lines of hydrogen spectrum appear in $UV$ region
$III$) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation

• A
  $II$ & $III$ only
• B
  $I$ & $II$ only
• C
  $I$ & $III$ only
• D
  $I$,$II$,$III$