What is the lifetime of the average quasar?
A)less than 1 million years
B)a few tens of millions of years
C)a few hundred million years
D)several billion years

Question

Quizplus · Accepted Answer

Quasars, which are extremely luminous active galactic nuclei, typically have lifetimes of a few hundred million years. This period represents the phase during which the supermassive black hole at the center of a galaxy is actively accreting material and emitting vast amounts of energy.

What Is the Lifetime of the Average Quasar