Doubt from titration

@Shwetanshu_2018 sir, @Shaquib sir pls help..

Is option A correct ?!
I’m not very sure , but if yes them do let me know , I’ll explain that why i think option a should be correct

Correct @Shwetanshu_2018

Initial when ligand is added then it combines with M to form complex and hence volume of L remains almost const and hence it should be const initially , but after some time L is excess and hence it increases linearly on addition of external L

Sir could you elaborate a bit? Like I didn't understand how the concentration of ligand is constant and then it becomes excess..pls explain

Initially metal would be there , so L will combine with M to form C and after some time , when M will become the limiting reagent them L will be excess and that excess amount will not react to form C and hence volume of L after some time will start to increase bit initially it will be constant as M will react with it to form C and thus will consume the L added

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