Atomic Structure

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 II \& III onlyI \& II onlyI \& III onlyI, II, III
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