Read the sentences below about the relationship between spoken and written English and the sounds of vowels and consonants.
Identify which statements are true.

I.The pronunciation of a word can always be predicted by  its spelling.
II.In English, the same letter can represent different sounds, as in "a" in cat, cake and father.
III.Consonant sounds involve an obstruction of airflow, while vowel sounds are produced with a free flow of air through the mouth.

It is correct what is stated in: