To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) They are needed to study - This option is incorrect because although both an eye doctor and a teacher are needed for different purposes, the statement does not establish a direct similarity between them.
Option B) Both test the pupils - This option is correct because both an eye doctor and a teacher test the pupils. An eye doctor tests the pupils to assess the health of the eyes and diagnose any potential vision problems, while a teacher may test the pupils to assess their understanding and knowledge in a particular subject.
Option C) There is no relation - This option is incorrect because there is a relation between an eye doctor and a teacher, as explained in option B.
Option D) They teach - This option is incorrect because although a teacher does teach, an eye doctor primarily focuses on diagnosing and treating eye conditions rather than teaching.
The correct answer is B) Both test the pupils. This option is correct because both an eye doctor and a teacher test the pupils, although for different purposes.