Fill in the blanks with the most appropriate option:-

Only those who have scored above 90% in the entrance exam are ………… to apply for this post.

eligible

The correct option to fill in the blanks is eligible.

The sentence is about the eligibility criteria for applying for a post. The word "eligible" means qualified or fit to be chosen. It is the most appropriate word to use in this context, as it describes the requirement of scoring above 90% in the entrance exam to be eligible to apply for the post.

The other options are not as appropriate:

• Selected means chosen or picked out. It is not accurate to use "selected" in this context, as the people who have scored above 90% in the entrance exam have not yet been selected for the post.
• Suitable means right or appropriate for a particular purpose. It is not as appropriate as "eligible", as it does not convey the same sense of qualification or fitness.
• Elected means chosen by voting. It is not accurate to use "elected" in this context, as the people who have scored above 90% in the entrance exam have not yet been elected for the post.