Determiners 'an' and 'an'

Which is correct?

• an apple

• a apple

Which is correct?

• a cat

• an cat

Which is correct?

• a hour

• an hour

Which is correct?

• a ice cream

• an ice cream

Which is correct?

• a caterpillar

• an caterpillar

Which is correct?

• a one-eyed pirate

• an one-eyed pirate

Which is correct?

• a enormous elephant

• an enormous elephant

Which is correct?

• an unicorn

• a unicorn

Which is correct?

• He was an honest man.

• He was a honest man.

Which is correct?

• The policeman wore a uniform.

• The policeman wore an uniform.