Which type of vaccine protect against Diphtheria?

Which of the following is mRNA vaccine used against Covid-19 infection?

An antibiotic is not useful against a virus whereas a vaccine is. Which one of the following is the most appropriate reason for this ?

Clotting of blood involves which one among the following clotting proteins?

Sulpha drug is which of the following types of drug?

Which one of the following is a Sulfa Drug?