Which is the correct ascending order for the acidic strength of methane, ammonia, water and hydrogen fluoride ?

Which is the correct ascending order for the acidic strength of methan

1.	Which is the correct ascending order for the acidic strength of methane, ammonia, water and hydrogen fluoride ?
Answer» `HF GT gt H_2O gt gt NH_3 gt gt CH_4` `CH_4 LT lt NH_3 lt lt H_2O lt lt HF` `HF lt lt H_2O lt lt NH_3 lt lt CH_4` `CH_4 lt lt HF lt lt H_2O lt lt NH_3` ANSWER :B