In a complexometric titration of metal ion with ligand M (Metal ion) + L(Ligand) $$\rightarrow$$ C (Complex). End point is estimated spectrophotometrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs then the titration plot between absorbed light (A) versus volume of ligand 'L' (V) would look like:

A

B

C

D