Impedance can be measured using which among the following instrument?

LCR Meter:

• An LCR meter is a type of electronic test equipment used to measure the inductance (L), capacitance (C), and resistance (R) of an electronic component.
• In the simpler versions of this instrument, the impedance was measured internally and converted for a display to the corresponding capacitance or inductance value.
• The LCR meter measures current, voltage, and phase angle and calculates the corresponding LCR values, which can be represented in a number of forms.
• The LCR meter can be operated fully automatically, eg in RS- 232, USB, LAN, or Handler.

CRO:

The cathode-ray oscilloscope (CRO) is a common laboratory instrument that provides accurate time and amplitude measurements of voltage signals over a wide range of frequencies.

DSO: 

A digital storage oscilloscope (DSO) is an oscilloscope that stores and analyses the signal digitally rather than using analog techniques. It is now the most common type of oscilloscope in use because of the advanced trigger, storage, display, and measurement features that it typically provides.

Function Generator:

A function generator is a type of electronic equipment that generates different types of electronic waveforms over a wide range of frequencies.