Read the following statements regarding adaptations in deep-diving sea creatures (such as sperm whales and bottlenose whales) and select the correct ones.
(i) They have collapsible lungs which reduce lung rupture and increased blood nitrogen level.
(ii) During the dive, they rely on oxygen stored in their blood and muscles.
(iii) Air filled sinuses have extensive blood vessels that swell up during diving to reduce the size of air filled spaces.
(iv) Haemoglobin concentration in these mammals is twice as much as that found in terrestrial mammals.
(v) Concentration of myoglobin (oxygen storage pigment) is extremely elevated in these animals.
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