Consider the Following Three Samples

Consider the following three samples.
A.A sample containing 180 g glucose (C₆H₁₂O₆)
B.A sample containing 90 g glucose and 90 g mannose (C₆H₁₂O₆)
C.A sample containing 180 g mannose
Which statement is correct?

A) All three samples have the same number of oxygen atoms.
B) Both samples A and C have the same number of oxygen atoms,but more than in sample B.
C) Sample B has more oxygen atoms than sample A or sample C.
D) Sample C has more oxygen atoms than sample A or sample B
E) Sample A has more oxygen atoms than sample B or sample C.