The plate characteristic curve of a diode in space charge limited region is as shown in the figure. The slope of curve at point $P$ is $5.0 m A / V$. The static plate resistance of diode will be
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  • A$111.1 \Omega$
  • B$222.2 \Omega$
  • C$333.3 \Omega$
  • D$444.4 \Omega$
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