2 and 3 are correct.
Core Inflation is also known as underlying inflation, is a measure of inflation which excludes items that face volatile price movement, notably food and energy. In other words, Core Inflation is nothing but Headline Inflation minus inflation that is contributed by food and energy commodities.

Option d is correct.
In economics, the Laffer curve, developed by supply-side economist Arthur Laffer, illustrates a theoretical relationship between rates of taxation and the resulting levels of the government’s tax revenue. The Laffer curve assumes that no tax revenue is raised at the extreme tax rates of 0% and 100%, and that there is a tax rate between 0% and 100% that maximizes government tax revenue.
The shape of the curve is a function of taxable income elasticity – i.e., taxable income changes in response to changes in the rate of taxation.
The Laffer curve is typically represented as a graph that starts at 0% tax with zero revenue, rises to a maximum rate of revenue at an intermediate rate of taxation, and then falls again to zero revenue at a 100% tax rate.

2 and 3 are correct.
The International Finance Corporation (IFC) is an international financial institution that offers investment, advisory, and asset-management services to encourage private-sector development in developing countries. The IFC is a member of the World Bank Group and is headquartered in Washington, D.C. in the United States. It was established in 1956, as the private-sector arm of the World Bank Group, to advance economic development by investing in for-profit and commercial projects for poverty reduction and promoting development.
Since 2009, the IFC has focused on a set of development goals that its projects are expected to target. Its goals are to increase sustainable agriculture opportunities, improve healthcare and education, increase access to financing for microfinance and business clients, advance infrastructure, help small businesses grow revenues, and invest in climate health.

Statement 1 is correct.
Treasury bills or T-bills, which are money market instruments, are short term debt instruments issued by the Government of India and are presently issued in three tenors, namely, 91 day, 182 day and 364 day. Treasury bills are zero coupon securities and pay no interest. Instead, they are issued at a discount and redeemed at the face value at maturity. For example, a 91 day Treasury bill of ₹100/- (face value) may be issued at say ₹ 98.20, that is, at a discount of say, ₹1.80 and would be redeemed at the face value of ₹100/-.

Option a is correct.
Monetary Policy Framework Agreement is an agreement reached between Government and the central bank in India – The Reserve Bank of India (RBI) – on the maximum tolerable inflation rate that RBI should target to achieve price stability.
The Reserve Bank of India and Government of India signed the Monetary Policy Framework Agreement on 20 February 2015 which made inflation targeting and achieving price stability the responsibilities of RBI. Subsequently, the government, while unveiling the Union Budget for 2016-17 in the Parliament, proposed to amend the Reserve Bank of India (RBI) Act, 1934 for giving a statutory backing to the aforementioned Monetary Policy Framework Agreement and for setting up a Monetary Policy Committee (MPC).