A student carries out an experiment and plots the `V-I` graphs of three samples of nichrome wire with resistances `R_1,R_2 and R_3` respectively, (Fig. 3.41). Which of the following is true ?
A. `R_(1) = R_(2) = R_(3)`
B. `R_(1) gt R_(2) gt R_(3)`
C. `R_(3) gt R_(2) gt R_(1)`
D. `R_(2) gt R_(3) gt R_(1)`