Answer
(b) has two significant figures, which is the smallest number in the entire list.
Work Step by Step
a) has three significant figures: 5, 4 and 5.
b) has two significant figures: 6 and 4.
c) has three significant figures: 6, 5 and 0.
d) has four significant figures: 1,3,4, and 6.
The correct answer is (b).
