isomers

Consider the following reaction and statements: [Co(NH_(3))_(4)Br_(2)]^(+)+Br^(-) to [Co(NH_(3))_(3)Br_(3)]+NH_(3) Two isomers are produced if the reactant complex ion is a cis-isomer Two isomers are produced if the reactant complex ion is a trans-isomer Only one isomer is produced if the reactant complex ion is a trans-isomer Only one isomer is produced if the reactant complex ion is a cis – isomer The correct statements are

The isomer is

An isomer of C_(6)H_(14) forms three monochloro derivaties. The isomer may be- (Excluding stereo isomer)

Based on the above isomer answer the following (A to F). Which isomer is least acidic ?