[Vanguard] Suspended Managing Director of Nigerian Ports Authority, NPA, Hadiza Bala-Usman, yesterday dismissed claims by a former board member of the agency, Senator Binta Garba, that she was removed from office because she asked questions about its operations. But reacting yesterday, Hadiza in a statement, said Garba's claim was not only spurious but also presented her as one who had lent herself to be used as agent of destabilisation of the agency.