Task: Question Answering
Input (English): Problem: one ball will drop from a certain height . the height it will reach after rebounding from the floor is 50 percent of the previous height . the total travel is 150 cm when it touches the floor on third time . what is the value of the original height ? 
Options: a ) 60 cm , b ) 90 cm , c ) 100 cm , d ) 120 cm , e ) 130 cm
Output (English): a