With both eyes open, a person's field of view is about:(a) 90° (b) 150° (c) 180° (d) 360°

 (c) 180°      

Explanation

Human beings have two eyes in front of their head, which provides them a wider field of view.

With one eye open, a person has a field of view of about 150º, while with two eyes open he has a wider field of view of 180º.