Question

In the below figure, the plane, the incident point and the normal drawn at the incident ray are

respectively?
A: 231
B:213
C :123
D:132
​

Answer 1

The sequence of the the plane, the incident point and the normal drawn at the incident ray is 321 or 123

ExPlanation:-

The plane is numbered as 3, the incidient ray as 2 and normal is 1. So, logically according to sequence given in the question 321 will be the answer. But am not sure why isn't it in the options, may be it is written in reverse order so the answer might be 123 or maybe I'm wrong with something here.

________________________

Thank youu!! :)) $\;$