Correct Option (C)
A rise in SENSEX indicates an overall increase in the share prices of a select group of companies listed on the Bombay Stock Exchange (BSE). SENSEX, a portmanteau of Sensitive Index, is a market index comprising 30 financially sound and actively traded companies representative of various industrial sectors. Its movement reflects the general sentiment and performance of the Indian stock market.
Incorrect Options:
Options A, B, and D are incorrect because SENSEX does not represent all companies registered with the Bombay Stock Exchange (BSE) or the National Stock Exchange (NSE). It specifically tracks the performance of a carefully chosen basket of 30 companies. Therefore, a rise in SENSEX does not imply a rise in prices of shares of all companies, nor does it pertain to the National Stock Exchange.