Phenolphthalein is the most suitable indicator for the titration of:

Indicator for the titration of $HCl$ and $Na_2CO_3$ would be

The indicator used in the titration of $Na_2CO_3$ with $HCl$ is..................

The indicator used in titrating a weak acid (e.g.,oxalic acid) with a strong base (e.g.,caustic soda) solution is

Phenolphthalein is not a good indicator for titrating :-

Given below are two statements.
Statement $I:$ In the titration between a strong acid and a weak base,methyl orange is a suitable indicator.
Statement $II:$ For the titration of acetic acid with $NaOH$,phenolphthalein is not a suitable indicator.
In the light of the above statements,choose the most appropriate answer from the options given below: