Question

समतल दर्पण पर पड़ने वाली एक ही प्रकाश किरण की कितनी परावर्तित किरणें हो सकती है

Answer 1

A convergent light beam can do this.

So the answer is "convergent".

You should be able to show this by drawing a "ray diagram" for the light beam. The reflected rays converge and that's what's needed to produce a real image.