text: Children with Tetralogy of Fallot may develop acute severe cyanosis or hypoxic<unk> ".  The<unk>  are unpredictable and are associated with profound cyanosis and can be fatal.
option_0: Tet spells
option_1: Kussmaul breathing
option_2: Sleepwalking
option_3: Tetany
option_4: Constipation  in kids
option_5: Snakebites
option_6: Snakebites 
option_7: Trench mouth