The correct answer is 4) All of these.
In fact, when the two identical resistor are connected in series, the current flowing through them is the same, I.
The difference of voltage on each resistor is
[tex]\Delta V=RI[/tex]
but the two resistors have same resistance R and same current I, so the difference of voltage on them is the same.
Similarly, the power dissipated on each resistance is
[tex]P=I^2 R[/tex]
And again, the current I is the same for the two resistors, and they have the same resistance R as well, so the power dissipated is the same for the two resistors.