Refer the given figure showing some aquatic plants.
Select the correct option regarding the labelled plants 'L', 'M' and 'N'.
(a) Plant 'L' - Their leaves are narrow and thin so that they can bend in flowing water.
(b) Plant 'N' - The stomata are on the top of the leaf surface so that the water does not block them.
(c) Plant 'M' - Their leaves are spongy as they have air in them.
(d) All of these.