Highest oxidation state of Mn is exhibited in Mn2O7. The correct statements about Mn2O7 are
(A) Mn is tetrahedrally surrounded by oxygen atoms
(B) Mn is octahedrally surrounded by oxygen atoms
(C) Contains Mn-O-Mn bridge
(D) Contains Mn-Mn bond. Choose the correct answer from the options given below
(1) A and C only
(2) A and D only
(3) B and D only
(4) B and C only