In an unbiased $n-p$ junction,electrons diffuse from $n-$ region to $p-$ region because

  • A
    holes in $p-$ region attract them
  • B
    electrons travel across the junction due to potential difference
  • C
    only electrons move from $n$ to $p$ region and not the vice-versa
  • D
    electron concentration in $n-$ region is more compared to that in $p-$ region

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