In Quantum Mechanics the Product of the Uncertainty in Position

Multiple Choice

In quantum mechanics the product of the uncertainty in position times the uncertainty in velocity must be

A) smaller than Planck's constant divided by mass.
B) larger than Planck's constant divided by mass.
C) equal to Planck's constant divided by mass.
D) added to Planck's constant divided by mass.
E) larger than Planck's constant multiplied by mass.