Which is the correct sequence of the components of a reflex arc?

Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action.

(ii) Sensory neurons carry signals from the spinal cord to muscles.

(iii) Motor neurons carry signals from receptors to the spinal cord.

(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called the reflex arc.

Which of the following statements are true about the brain?

(i) The main thinking part of brain is hindbrain.

(ii) Centres of hearing, smell, memory, sight, etc., are located in forebrain.

(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

(iv) The cerebellum does not control the posture and balance of the body.