Which of the followingelectronic instruments (orequipment) can be used tomeasure correctly thefundamental frequencycomponent of a waveform andits higher harmonics?1. Cathode ray oscilloscope2. Vacuum tube voltmeter3. Spectrum analyzer4. Distortion factor meterSelect the correct answerusing the codes given below

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Which of the followingelectronic instruments (orequipment) can be used tomeasure correctly thefundamental frequencycomponent of a waveform andits higher harmonics?1. Cathode ray oscilloscope2. Vacuum tube voltmeter3. Spectrum analyzer4. Distortion factor meterSelect the correct answerusing the codes given below