In an n channel JFET, the gate is

Answer - B.  P-type

In an N channel JFET, the gate is P-type. 

Solution

The detailed solution to the question In an n channel JFET, the gate is provided here. 

The Schematic of an n-channel JFET is as shown-

 The gate is P-type connected to the negative supply, i.e., reverse biased to control the flow of electrons.

Therefore, In an n channel JFET, the gate is p-type. Hence, Option (B) is correct.