all the subjects are included(like biology, chemistry, maths, english, & phsycology) in exam or only one specified subject we have to choose for exam ?
You need not choose the subjects. These subjects like: Biology, Physics, Chemistry, Mathematics, Psychology, and English Literature will already be included in the GRE subject test. There will be a total of 188 questions, and the exam duration will be of about 3 hours and 45 minutes.
Hope it helps!!!