The GST exam typically refers to the Goods and Services Tax examination, which is a tax-related exam conducted in some countries. It does not involve subjects such as chemistry, biology, physics, and English.
However, if you are referring to a different exam or scenario where students are required to answer questions from chemistry, biology, physics, and English, then the subject or grade received would depend on the specific grading system or criteria set by the exam board or educational institution. Without further information about the grading system, it is not possible to determine the subject or grade the student would receive.