Question

he is _________honest man(suitable determiner​

Answer 1

$\large\sf{\underline{\underline{Answer}}}$

$\longrightarrow$ He is an honest man.

$\large\sf{\underline{\underline{Reason}}}$

$\longrightarrow$ It is because in the word honest 'h' is silent. So, we see 'o' and o is a vowel so we apply an with this.