Step 1: Functions of a Stock Exchange
A stock exchange provides liquidity, ensures safety, and promotes investments.
Step 2: Analysis of Statements
- (A) Stock exchanges are crucial for the liquidity and marketability of securities.
- (B) Stock exchanges promote public engagement in equity investments.
- (C) Transactions are regulated to ensure safety.
- (D) Stock exchanges cannot eliminate speculation, as it is inherent to market operations.
Conclusion: The correct option is (mathbf{(D)}), acknowledging that speculation is an intrinsic element of all financial markets.