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Match column I (measurement) with column II (significant figures)
column I column II
A 6.07kg I 5
B 0.0075 m II 2
C 4.2 x 10^-3 m III 3
D 22.300 m IV 4

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A	B	C	D
III	IV	II	I

A	B	C	D
III	V	II	I

A	B	C	D
III	II	II	I

A	B	C	D
III	II	II	III

answer is C.

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Detailed Solution

	column I		column II
A	6.07kg	III	3
B	0.0075 m	II	2
C	4.2 x 10^-3 m	II	2
D	22.300 m	I	5

Zeros at the begining of numbers preceding nonzero figures are not significant

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