Problem 12-14 Ohm's law

In the circuit above the current is $2.38\; A$.­ What are

(a) the resistance $R$?
(b) the direction of the current through the resistor?
(c) the potential difference $V_A - V_C$?

[Ans. (a) $1.36\; \Omega$   (b) $\text{toward top of diagram}$   (c) $3.24\; V$]

 What is the voltage across the resistor $R$?

(A)  $2.38 \;V$

(B)  $0$

(C)  $3.24\; V$