Which of the following statement(s) is/are correct as per the Union Budget 2011-2012?

i. Eligibility for pension under Indira Gandhi National Old Age Pension Scheme for BPL beneficiaries reduced from 65 years of age to 60 years. ii. Servcie tax on hotel accomodation above Rs 1,500 per day. iii. AC hospitals with more than 25 beds under service tax. iv. Propose to raise service tax on air travel.