The decreasing order of acid strength of the following compounds:

The given compounds are
Water ($\ce{H2O}$)
Ammonia ($\ce{NH3}$)
Acetylene ($\ce{C2H2}$)
Triphenyl system ($\ce{Ph3CH}$)

Options as given as well :- a) $\ce{NH3}$ > $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$

b) $\ce{H2O}$ > $\ce{C2H2}$ > $\ce{Ph3CH}$ > $\ce{NH3}$

c) $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{Ph3CH}$ > $\ce{NH3}$

d) $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{NH3}$

The decreasing order of acid strength of the following compounds:

The given compounds are
Water ($\ce{H2O}$)
Ammonia ($\ce{NH3}$)
Acetylene ($\ce{C2H2}$)
Triphenyl system ($\ce{Ph3CH}$)

a) $\ce{NH3}$ > $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$
b) $\ce{H2O}$ > $\ce{C2H2}$ > $\ce{Ph3CH}$ > $\ce{NH3}$
c) $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{Ph3CH}$ > $\ce{NH3}$
d) $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{NH3}$

I gave the answer to be $\ce{Ph3CH}$ > Acetylene > Water > $\ce{NH3}$. Here I have marked the triphenyl system as the most acidic because it has resonance stabilization involved and $\ce{NH3}$ as the least acidic because it has basic nature. Using these two facts I have marked the answer as above however it was wrong. What is the correct order and why?

The decreasing order of acid strength of the following compounds:

The given compounds are
Water ($\ce{H2O}$)
Ammonia ($\ce{NH3}$)
Acetylene ($\ce{C2H2}$)
Triphenyl system ($\ce{Ph3CH}$)

The decreasing order of acid strength of the following compounds:

The given compounds are
Water ($\ce{H2O}$)
Ammonia ($\ce{NH3}$)
Acetylene ($\ce{C2H2}$)
Triphenyl system ($\ce{Ph3CH}$)

Options as given as well :- a) $\ce{NH3}$ > $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$

b) $\ce{H2O}$ > $\ce{C2H2}$ > $\ce{Ph3CH}$ > $\ce{NH3}$

c) $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{Ph3CH}$ > $\ce{NH3}$

d) $\ce{Ph3CH}$ > $\ce{C2H2}$ > $\ce{H2O}$ > $\ce{NH3}$

The decreasing order of acid strength of the following compounds:

The given compounds are

Water (H2O)

Ammonia (NH3)

C2H2 (Acetylene)

Ph3CH (Triphenyl system)

The decreasing order of acid strength of the following compounds:

The given compounds are
Water ($\ce{H2O}$)
Ammonia ($\ce{NH3}$)
Acetylene ($\ce{C2H2}$)
Triphenyl system ($\ce{Ph3CH}$)