There are three isomeric compounds `P,Q,R` with molecular formula `C_(4)H_(6)O_(3)`.Compound `P` is a saturated hydroxy carboxylic acid.Compound `Q` is a symmetrical anhydride while `R` is an aldehydic ester.
Which of the following is the metamer of `Q`?
A. `CH_(3)-oversetoverset(O)(||)(C)-O-oversetoverset(O)(||)(C)-CH_(3)`
B. `H-oversetoverset(O)(||)(C)-O-oversetoverset(O)(||)(C)-CH_(2)-CH_(3)`
C. `H-oversetoverset(O)(||)(C)-O-CH_(2)-oversetoverset(O)(||)(C)-CH_(3)`
D. `CH_(3)-O-oversetoverset(O)(||)(C)-oversetoverset(O)(||)(C)-OCH_(3)`