Q. In 2002 AD, according to research, the concentration of $CFC_{s}$reached to
A) 368 ppm
B) 1750 ppb
C) 261 ppt
D) 326 ppb
Explanation
The correct answer is Option C: 261 ppt.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.