Which of the following wiring diagrams could be used to experimentally determine R using ohm’s law? Assume an ideal voltmeter and an ideal ammeter.

Ohm's Law is V = i x R, 

For determining the value of R, we need to know the current i through the resistance and the potential difference across the resistance. This is measured appropriately by using an ammeter in series with the resistance and voltmeter connected across the two ends of the resistance.