If a Reaction A $\to$ B Has ,Then When the Reaction Is at Equilibrium

If a reaction A $\to$ B has ,then when the reaction is at equilibrium there will be __________

A) absolutely no B formed.
B) smaller quantities of B and larger quantities of A.
C) equal quantities of A and B.
D) large quantities of B and smaller quantities of A.
E) absolutely no A remaining.