False statements among the following are

A) Tritium is a   $\mathrm{\beta }-$emitter                     B)  Terrestrial Deuterium exists as HD

C) Protium contains one neutron       D) Deuterium and Tritium are radioactive

• A

  A, B only

• B

  B, C only

• C

  C, D only

• D

  A, D only