Which of the following statements is or are correct? 

I. Number of significant figures in 2345.100 is three 

II. 0.00787 rounded to two significant figures is written as $$0.787 \times 10^{-2}$$ 

III. 340 rounded to two significant figures is written as $$0.34 \times 10^3$$

IV. The number of significant figures in 0.020 is two

A

II and III

B

III and IV

C

I, II and IV

D

III only