Explanation:

 Kutch and Kathiawar, though an extension of Peninsular plateau (because Kathiawar is made of the Deccan Lava and there are tertiary rocks in the Kutch area), they are still treated as integral part of the Western Coastal Plains as they are now levelled down.

As Western Ghats are example of submerged coast, so Kaithawar pennisula is also an example of submerged coast.