The correct option is A a. Western Coast is broken and indented.
Answer-a
The Eastern Coast is smooth and unfit for making ports. So, very few ports are developed there.But the Western Coast is broken and indented and suitable for ports. West coast is coast of submergence (except Malabar Coast) while east coast is an emergent coast.Continental shelfon east extends up to 500 km into the sea, so, difficult to develop good ports and harbours. Ships can enter and leave only during tides. But this does-not mean we cannot have ports in this condition. Some of the world's well known ports are located on Continental shelves like London, Singapore, Hong Kong.