A Correct Formula (Dropping All Minus Signs) for the Calculation

Multiple Choice

A correct formula (dropping all minus signs) for the calculation of the elasticity of demand between point Q? , P?
And point Q?, P? is

A) [(P? ? P? ) /(P? + P?) ]/[(Q? ? Q?) /(Q? + Q?) ]
B) [(P? ? P? ) /P?]/[(Q? ? Q?) /Q?]
C) [(Q? ? Q? ) /(Q? + Q?) ]/[(P? ? P?) /(P? + P?) ]
D) [(Q? ? Q? ) /Q?) ]/[(P? ? P?) /P?].