India's ruling Congress party has been hit by a series of damaging corruption scandals over the past year. The opposition has made regular calls for Prime Minister Manmohan Singh to resign, over every scam that has gripped the nation.
The major corruption controversies to have beset the government in its second term of office are:-
2G Spectrum scan, 2011: It involved government officials illegally undercharging mobile telephony companies for frequency allocation licenses, which they would then use to create 2G subscriptions for cell phones.