Severe depression that comes on suddenly or seems to have no external cause is called

Severe depression that has a sudden onset or seems not to have any external cause whatsoever is called major depression. Major depression is sometimes referred to as unipolar disorder or major depressive disorder (MDD); typical signs of MDD include persistent feeling of sadness or a lack of interest in outside stimuli.

answer; the above statement is (false);

answer; the answer is (yes);