<prompt> All except one is true regarding Suboccipital triangleSemispinalis capitis forms roof of suboccipital triangleRectus capitis posterior major and minor form boundaries of suboccipital trianglePosterior atlantooccipital membrane forms floor of the triangleIt contains 3rd part of vertebral artery  <response>: Rectus capitis posterior minor doesnt form boundary of suboccipital triangle, even though it is seen in this region. 