NEET 2022 Chemistry question on States of Matter

1. A.
   $p = p_1 + p_2 + p_3$
2. B.
   $p = n_1\dfrac{RT}{V} + n_2\dfrac{RT}{V} + n_3\dfrac{RT}{V}$
3. C.
   $p_i = \chi_i p$, where $p_i$ = partial pressure of $i$th gas, $\chi_i$ = mole fraction of $i$th gas in gaseous mixture
4. D.
   $p_i = \chi_i p_i^*$, where $\chi_i$ = mole fraction of $i$th gas in gaseous mixture, $p_i^*$ = pressure of $i$th gas in pure state

[NEET 2022]