Which of the following are the characteristics of isotopes of an element?
$(i)$ Isotopes of an element have same atomic masses
$(ii)$ Isotopes of an element have same atomic number
$(iii)$ Isotopes of an element show same physical properties
$(iv)$ Isotopes of an element show same chemical properties

• A
  $(i), (iii)$ and $(iv)$
• B
  $(ii), (iii)$ and $(iv)$
• C
  $(ii)$ and $(iii)$
• D
  $(ii)$ and $(iv)$