Circuit configuration ambiguous without diagram

Steps:

• Identify resistors: two of R, two of 3R, connected to 8V cell with negligible internal resistance.
• Note voltmeter placement unspecified, preventing exact analysis.
• Common setups (e.g., series-parallel or bridge) yield different voltages, but none confirmed.
• Conclude insufficient details for precise calculation.

Why C is correct:

• Not enough information to verify, but stated as correct; likely assumes specific unshown configuration where voltmeter reads half the e.m.f. per voltage division rule.

Why the others are wrong:

• A: 0V implies balanced bridge, but ratios may not balance without diagram.
• B: 2V possible in partial division, but unconfirmed setup.
• D: 6V suggests minor drop, inconsistent with typical equal resistor pairings.

Final answer: C