Read the passage given below and answer the following questions from (i) to (v).
Human brain, the most complex organ in the human body, and is the controller of behaviour, seat of intelligence, interpreter of the senses, and initiator of body movements. Brain is still seen as an incomprehensible part of our body, and researchers are doing enough efforts to discover its secrets. Different parts of the brain have different and specific functions. Researchers have now gained enough insights into the healthy functioning of brain and reasons of malfunctioning in case of diseases related to the brain.
(ii) Involuntary muscular actions are controlled by:
(1)