At 56 C and 2 atm, three 1.0 L flasks are filled with different gases as follows: 16 g of N2, 16 g of O2, and 16 g of CO

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At 56 C and 2 atm, three 1.0 L flasks are filled with different
gases as follows: 16 g of N2, 16 g of O2, and 16 g of CO2,
respectively.
Which of the following statements is true?
i. The flask with CO2 has the most molecules.
ii. All flasks have the same number of gas molecules.
iii. The flask with N2 has the most molecules.
iv. The flask with O2 has the most molecules.
Here, do we take molar mass into consideration that the gas with
the least molar mass will have the most number of molecules? Or
because P, V, and T are the same, we say the all of them have the
same number of molecules?
Kindly explain which path and why.