Coordination Compounds Part 4

A metal complex with a formula MCl4⋅3NH3 is involved in sp3d2 hybridisation. It upon reaction with excess of AgNO3 solution gives ' x ' moles of AgCl . Consider ' x ' is equal to the number of lone pairs of electron present in central atom of BrF5. Then the number of geometrical isomers exhibited by the complex is ____ .