Given, A=0.001204m B=43120000m, and C=1.200m We know that, zeroes at the right hand side of any number are non significant, hence number of significant figure in B,NB=4. Zeroes after decimal point and before any number are not significant. Therefore, no. of significant figure in A,NA=4. Zeroes at the R.H.S adjacent to number after the decimal point are significant. ∴ No. of significant figure in C,NC=4 ∴NA=NB=NC=4