To pursue a B.Sc. (Bachelor of Science) degree at St. Thomas College, Kottayam, Kottayam, aspiring candidates must meet the following eligibility criteria. Firstly, they should have completed their higher secondary education (10+2) or its equivalent from a recognized board or university. Secondly, candidates must have studied Science subjects such as Physics, Chemistry, and Biology/Mathematics in their 10+2 curriculum. Additionally, they should have secured a minimum aggregate score of 50% in their qualifying examination. It is important to note that the eligibility criteria may vary based on the college's admission policies, and candidates are advised to refer to the official college website for detailed information.