Q. Life appeared
A) 500 million years after the formation of earth
B) 600 million years after the formation of earth
C) Four billion years back
D) Both (a) and (c)
Explanation
Life appeared 500 million years after the formation of earth, i.e., almost 4 million years from the present day
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.