How much excess reactant remains when 50.0 g of MgBr2 reacts with 100.0 g AgNO3 based on the following chemical reaction?

M g B r subscript 2 space plus space 2 space A g N O subscript 3 space rightwards arrow space 2 space A g B r space plus space M g left parenthesis N O subscript 3 right parenthesis subscript 2

B.
92.3 g

A.
110.3 g

B.
92.3 g

C.
102 g

D.
7.7 g