Assuming ISA conditions, which statement with respect to the climb is correct ?

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

At constant IAS the Mach number increases

QuizVDS · Answer

At constant Mach number the IAS increases

QuizVDS · Answer

At constant IAS the TAS decreases

QuizVDS · Answer

At constant TAS the Mach number decreases

Id 249 - ATPL - Assuming ISA conditions, which statement with respect to the climb is correct ?