A biotechnology student is performing an experiment in which he is trying to count the population of a bacteria after every hour. Each bacteria multiplies and becomes 8 times itself in 1 hour. But some of the bacteria die after every 2 hours. The population after 10 hours from the start of the experiment is what percentage of the initial population?

A) The number of bacteria at the start of the experiment was 1 million.
B) After every 2 hours, 1/4th of the bacteria dies

Answer: B

Source: e-GMAT