The question asks which statement about the non-inverting amplifier is false. This configuration feeds the input signal to the op-amp's non-inverting (+) terminal while a resistor divider from the output provides negative feedback to the inverting (−) terminal, giving a closed-loop voltage gain of A_v = 1 + R_f/R₁.

Checking each statement against the known properties:

• High input impedance — TRUE. Because the signal drives the op-amp's non-inverting input directly, the source sees the amplifier's very large input impedance, which is a key advantage of this topology.
• Higher magnitude gain for the same resistors than an inverting amplifier — TRUE. The non-inverting gain 1 + R_f/R₁ is always one unit larger in magnitude than the inverting gain R_f/R₁, so for identical resistor values its magnitude is greater.
• Ideal for instrumentation and buffer circuits — TRUE. Its high input impedance (and, in the unity-gain limit, its role as a voltage follower) makes it excellent for buffering and for the front end of instrumentation amplifiers.
• Limited to handling only DC signals — FALSE. A non-inverting amplifier handles both AC and DC signals; its useful frequency range is set by the op-amp's gain-bandwidth product, not by any restriction to DC. This is the false statement and therefore the answer.

So the incorrect claim is that the non-inverting amplifier works with DC only.