Task: Question Answering
Input (English): Problem: one bacterium splits into 8 bacteria of the next generation . but due to environment , only 50 % of one generation can produced the next generation . if the seventh generation number is 4096 million , what is the number in first generation ? 
Options: a ) 1 million , b ) 2 million , c ) 4 million , d ) 8 million , e ) none of these
Output (English): a