_______ is needed for the experimental verification of various theories.A. Unit
B. SymbolC. Instrument
D. Measurement
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Answer ⇒ Measurement and units. Option (a). and Option (d).
Reason/Explanation ⇒ Measurement is needed for the Experimental verification of various theories. This is because measurement used to compares the physical quantity with the known standard quantity of the same nature. Thus, It helps in knowing about that quantity with its dimensions.
Also, Unit which the standard quantity which is used as the comparison for the physical quantity is must for the classification of the quantity.
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Answer:
It is MEASUREMENT.. Hope it helps you...
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