Ziegler–Natta Catalyst is used in the manufacture of High density polythene (HDPE). Ziegler– Natta Catalyst is

• A

  ${\mathrm{TiCl}}_3+\mathrm{Al}{\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_3$

• B

  $\mathrm{Ti}{\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_4+{\mathrm{AlCl}}_3$

• C

  ${\mathrm{TiCl}}_4+\mathrm{Al}{\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_3$

• D

  ${\mathrm{TiCl}}_3+\mathrm{Al}{\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_3$