In which of the following arrangements, the sequence is not strictly according to the property written against it?

In which of the following arrangements, the sequence is not strictly a

1.	In which of the following arrangements, the sequence is not strictly according to the property written against it?
Answer» `HF LT HCI lt HBr lt HI`: increasing acid strength `NH_(3) lt PH_(3) lt AsH_(3) lt SbH_(3):` increasing basic strength `B lt C lt O lt N`: increasing first ionization enthalpy `CO_(2) lt SiO_(2) lt SnO_(2) lt PbO_(2)`: increasing oxidising power Answer :B