Xavier Aptitude Test 2014 Paper

(e) Subsumption relation is a ‘particular’ kind of relation in Ontology; so, the definite article precedes it. (Ontology is the philosophical study of the nature of being, becoming, existence, or reality, as well as the basic categories of being and their relations). Now we are left with options (b) and (e). The difference between but and yet (though both are conjunctions and are usually interchangeable) is that yet is used when there is an element of surprise. In this context, there is no surprise or contradiction/contrast involved. Hence, (e) is the right choice.