The first bird is believed to have appeared on the surface of the earth

Answer: (c) 150 million years ago

Archaeopteryx, the earliest known bird, lived about 150 million years ago (Late Jurassic).

The idea

The oldest known bird is Archaeopteryx, found in limestone in Germany. It had feathers and wings like a bird, and also teeth, clawed fingers and a long bony tail like a reptile. It shows that birds came from small feathered dinosaurs.

Fish → Amphibians → Reptiles → From reptiles: mammals and, about 150 million years ago, birds

Why the others are wrong

(a) 300 million years ago there were only early reptiles.

(b) Dinosaurs first appeared about 230 million years ago.

Also know

A fossil that shows features of two groups is called a connecting link. Archaeopteryx lived in the Jurassic period, the middle of the age of dinosaurs.