निम्नलिखित में से कौन सा हार्मोन मुख्य रूप से वृषण (टेस्टिस) द्वारा संश्लेषित और स्रावित होता है?

The disease Goitre is related to which of the following glands?

Which of the following is a mixed gland (heterocrine gland) in the human body that secretes both enzymes and hormones?

Which gland is active only until puberty and then gradually shrinks?