If the point $z=(1+i)(1+2i)(1+3i) \ldots (1+10i)$ lies on a circle with centre at the origin and radius $r$,then $r^2$ is equal to

  • A
    $10!$
  • B
    $2 \times 3 \times 4 \times \ldots \times 10$
  • C
    $2 \times 5 \times 10 \times \ldots \times 101$
  • D
    $11!$

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