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In molecular compounds the coordination number of an atom defines how many atoms or groups are attached to it. From the following list select all the possible molecular shapes for a molecule whose central atom has the coordination number 2: Select one or more: a. bent b. linear c. trigonal planar d. trigonal pyramidal e. t-shaped f. tetrahedral g. square planar h. disphenoidal i. trigonal bipyramidal j. square-based pyramidal k. pentagonal planar l. octahedral