The total duration of tripling is 2 hours.
Since it is tripling every 15 minutes, it will increase 120/15 = 8 times.
As the initial number is 10^3, the final number of molecules will be (10^3)*3^8.
Thus, the correct option is D.
Since it is tripling every 15 minutes, it will increase 120/15 = 8 times.
As the initial number is 10^3, the final number of molecules will be (10^3)*3^8.
Thus, the correct option is D.
