It is an unidirectional device that blocks the current flow from cathode to anode

It is an unidirectional device that blocks the current flow from cathode to anode 

 (A) SCR (B) PCR (C) VCR (D) DCR
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It is an unidirectional device that blocks the current flow from cathode to anode SCR 

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is mosfet current controlled device?

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