Biology · Evolution
Read the following assertion (A) and reason (R) statements carefully: Assertion (A): In the atmosphere of primitive Earth, there was no free oxygen. Reason (R): Earth's early atmosphere was reducing and probably formed from the gases given out by volcanoes. Select the correct option.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
Share:
- 1A is false, but R is true.
- 2A is true, but R is false.
- 3Both A and R are true, but R is not the correct explanation of A.
- 4Both A and R are true, and R is the correct explanation of A.✓
Correct answer
Both A and R are true, and R is the correct explanation of A.
Download Single Question PDF
Save this question and verified answer as a clean study sheet with live clickable link.
👥
Share with Friends & Study Groups
Challenge your peer aspirants on WhatsApp or Telegram to solve this question!
Online Test Series
Start Free Mock Test →Preparing for Biology?
Practice full-length mock tests with real exam timers, instant score analysis, and all-India ranking.
Chapter Practice
Practice Evolution MCQs →Want more practice questions on Evolution?
Solve complete topic-wise tests with detailed solutions on GkGet.
Related Practice Questions
Recommended practice questions in Biology · Evolution