A. 3 resistance arms
B. 2 resistance arms
C. 4 resistance arms
D. 6 resistance arms
I had been asked this question during a job interview.
The above asked question is from Introduction of Bridges topic in portion Measurement of Resistance of Electrical Measurements
Best explanation: A simple bridge circuit is made of a network consisting of 4 resistance arms. Usually a galvanometer is connected between the ends of the opposite two junctions in order to measure the flow of current.