The radian equivalent of 150° is ____________.

Correct option is B

​$$\begin{aligned}&\text{To convert degrees to radians, use the conversion formula:} \\&\quad \text{Radians} = \text{Degrees} \times \frac{\pi}{180} \\&\text{Apply this to } 150^\circ: \\&\quad 150^\circ \times \frac{\pi}{180} = \frac{150\pi}{180} = \frac{5\pi}{6}\end{aligned}$$​​