Ramsetu - NDA vs UPA

Now the political blame game has started regarding the controversial Sethusamudram project where the current Congress led UPA government is planning to build a canal called Sethusamudram by destroying the ancient Rama Sethu.

One of the blog readers provided this news item according to which, the Congress is blaming the BJP of hypocrisy saying, it was actually the BJP led earlier NDA government which sanctioned this project, and today the same BJP is opposing this project!

This is what I call, lying by saying partial truth.

It is of course true that it was NDA (led by BJP) which first approved the Sethusamudram canal project in 1998.

But the truth related to the controversy is a bit more than just that.

The project approved by NDA in 1998, DID NOT include destroying the Ram Sethu bridge, it was under UPA that the project location was altered to destroy the Ram Sethu.

There are totally 6 options available to build the Sethusamudram canal of which first 5 options pose no threat to the Ram Sethu. NDA had selected option 5 recommended by NEERI in 1998.

Today NEERI suddenly proposes option 6 to be used instead, and this requires destruction of the Ram Sethu, and not only that, option 6 is more costlier than option 5! Why is the UPA going ahead with this change? Why was this sudden change required in the first place?
See http://sethusamudram.gov.in/Images/Map1.jpg which shows all the 6 options. Look at the quality of this image on the very SSCP government website! Have they deliberately smudged the markings of option 5 and 6, or is it a poor quality scanning?