The revelation that all the 142 authorisations through Letters of Undertaking (LoU) were issued by Punjab National Bank to fund the companies owned by Nirav Modi in a matter of just two months — between March 1 and May 2 last year — nails the lie that the scam originated during the UPA era. The two national parties have resorted to a blame game ever since news of the scam broke out and news channels are busy taking one side or the other — which is unfortunate. With the mother of all bank scams showing the authorities in poor light,