The adrenal glands are endocrine glands. Endo means "in". Exo means "out". So adreanal glands are endocrine glands because the hormones they produce work in the body and not out.
I think the student wanted to ask about the difference between an exocrine and endocrine gland but mistakened and wrote both the same.
Exocrine gland differ from Endocrine gland because in case of...