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In regard to FETs, the following statements 1 to 4 are made. (1) In n-channel depletion mode MOS in the active region, the control voltage VGS is negative. (2) NMOS in depletion mode is cut off for VGS = 0. (3) NMOS in enhance mode is cut off for VGS = 0. (4) In the enhancement mode in normal condition, there is no path between source and drain. Of these, the true statements are?