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At what temperature (in degree celsius), the numerical values on Celsius and Fahrenheit scales become equal? कस तापमान (डी सेिसयस म) पर सेिसयस तथा फ़ारेनहाइट केल पर अंकय मान समान हो जातेह? Options: 1) –40 2) 40 3) 273 4) –273

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