The question is about which Indian state has considered creating an artificial inland port linked to the sea via a long navigational channel. The options provided are Andhra Pradesh, Chhattisgarh, Karnataka, and Rajasthan.

Option 1, Andhra Pradesh, and Option 3, Karnataka, are coastal states with direct access to the sea, so they wouldn`t need to construct an artificial inland port.

Option 2, Chhattisgarh, is an inland state; however, it`s not the correct answer as there`s no recent initiative or plan for creating an artificial inland port.

The correct answer is Option 4, Rajasthan. Even though it`s an inland state, it has explored the option of setting up an artificial inland port with sea connectivity via navigation channels. This kind of initiative can greatly benefit such landlocked states by improving their trade and transportation activities. Thus, it shows the government`s efforts to create better logistics and transportation infrastructure for the growth of the state`s economy.