The correct answer is: a) Parallel to the east coast.
The Eastern Ghats are a mountain range that runs parallel to the east coast of India. They are a part of the Deccan Trap, a large volcanic plateau that covers much of central and western India. The Eastern Ghats are much lower than the Western Ghats, which run parallel to the west coast. The Eastern Ghats are also much older than the Western Ghats, and they are not as continuous. The Eastern Ghats are an important source of water for many rivers in India, and they are also home to a variety of plant and animal life.
Option b) is incorrect because the Eastern Ghats do not run parallel to the west coast. The Western Ghats are a mountain range that runs parallel to the west coast of India.
Option c) is incorrect because the Eastern Ghats do not run north to south. The Eastern Ghats run parallel to the east coast of India.
Option d) is incorrect because the Eastern Ghats do not run east to west. The Eastern Ghats run parallel to the east coast of India.