multiple_name a. CH4+ 2O2 ? CO2 + 2H2O b. 2CH4+ 2O2 ? 2CO2 + 2H2O c. 3CH4+ 2O2 ? 2CO2 + 3H2O d. 2CH4+ 2O2 ? 2CO2 + 4H2O
multiple_correct yes hint
ID ans1 ans2 ans3 1 a. CH4+ 2O2 ? CO2 + 2H2O b. 2CH4+ 2O2 ? 2CO2 + 2H2O c. 3CH4+ 2O2 ? 2CO2 + 3H2O
select 1 id, (select * from question where left(id,1)='a') ans1, (select * from question where left(id,1)='b') ans2, (select * from question where left(id,1)='c') ans3, (select * from question where left(id,1)='d') ans4
var
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