Match Column I and Column II and choose the correct answer from the given options.
Column I Column II
a Recongnised the causal organism of mosaic disease of tobacco. i T. O. Diener and Raymer
b Demonstrated that extract of tobacco plant with mosaic disease could cause the same disease in healthy tobacco plants ii W. M. Stanley
c Showed that viruses could be crystallised iii M.W. Beijerinek
d Discovered the infectious agent that was smaller than viruses iv D. Ivanowsky
a b c d
1 iv iii ii i
2 iii iv ii i
3 iv i ii iii
4 iv ii i iii

	Column I		Column II
a	Recongnised the causal organism of mosaic disease of tobacco.	i	T. O. Diener and Raymer
b	Demonstrated that extract of tobacco plant with mosaic disease could cause the same disease in healthy tobacco plants	ii	W. M. Stanley
c	Showed that viruses could be crystallised	iii	M.W. Beijerinek
d	Discovered the infectious agent that was smaller than viruses	iv	D. Ivanowsky

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Detailed Solution

Column I	Column II
Recongnised the causal organism of mosaic disease of tobacco.	D. Ivanowsky
Demonstrated that extract of tobacco plant with mosaic disease could cause the same disease in healthy tobacco plants	M.W. Beijerinek
Showed that viruses could be crystallised	W. M. Stanley
Discovered the infectious agent that was smaller than viruses	T. O. Diener and Raymer

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