The junction diode in the following circ...

The junction diode in the following circuit requires a minimum current of `1 mA` to be above the knee point `(0.7 V)` of its `I-V` characterstic curve. The voltage across the diode is independent of current above the knee point. If `V_(B)=5 V`, then the maximum value of `R` so that the voltage is above the knee point, will be

`4.3 k Omega`

`860 k Omega`

`4.3 k Omega`

`860 Omega`

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