The correct answer is: A. Government Securities.
Government securities are debt obligations issued by the government of a country. They are considered to be one of the safest investments available, as they are backed by the full faith and credit of the government. In India, government securities are issued by the Reserve Bank of India (RBI) on behalf of the government. They are available in a variety of maturities, from short-term treasury bills to long-term bonds.
Corporate deposits are loans made by banks to corporations. They are considered to be a riskier investment than government securities, as they are not backed by the full faith and credit of the government. However, they also offer a higher interest rate.
Corporate equities are shares in the ownership of a corporation. They are considered to be the riskiest investment of the four options, as they are not guaranteed to generate a return. However, they also offer the potential for the highest returns.
Global depository receipts (GDRs) are certificates that represent shares in a foreign company. They are traded on stock exchanges in other countries. GDRs are considered to be a relatively safe investment, as they are backed by the shares of the underlying company.
In conclusion, government securities have a predominant share in the debt market in India. They are considered to be one of the safest investments available, as they are backed by the full faith and credit of the government.