By saying that the electrostatic field is conservative, we do not mean that (a) It is the gradient of a scalar potential. (b) Its circulation is identically zero. (c) Its curl is identically zero. (d) The work done in a closed path inside the field is zero. (e) The potential difference between any two points is zero.
The electrostatic field is conservative, which means The potential difference between any two points is zero.
Option e is correct.
Because the first branch has no resistance, the potential difference between the points is zero; therefore, no charge will flow between the two locations, and all charges will choose the second channel, according to V=IR.
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