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Question:

[CO2(CO)8] displays: no Co-Co bond, four terminal CO and four bridging CO; no Co-Co bond, six terminal CO and two bridging CO; one Co-Co bond, four terminal CO and four bridging CO; one Co-Co bond, six terminal CO and two bridging CO.

one Co - Co bond, four terminal CO and four bridging CO.

one Co-Co bond, six terminal CO and two bridging CO.

no Co -Co bond, six terminal CO and two bridging CO.

no Co-Co bond, four terminal CO and four bridging CO.

Solution:

According to given image 1 Co-Co bond 6 terminal Co and 2 bridging Co is present.Hence option D is correct.