As polling concludes in four states and one Union Territory in India, attention shifts to the anticipated exit polls. These polls aim to gauge voter sentiment immediately after voting, contrasting with opinion polls that are conducted weeks or months prior to elections. The exit polls will provide insights into whether the Bharatiya Janata Party (BJP) can challenge the Trinamool Congress in West Bengal, and how parties like the DMK and AIADMK fare in Tamil Nadu. However, the reliability of exit polls has been questioned due to historical inaccuracies, with projections sometimes failing to align with actual results, which will be announced on May 4. Opinion polls, on the other hand, utilize structured sampling methods to capture a representative cross-section of voters and are classified into pre-poll, exit, and post-poll surveys. Pre-poll surveys gauge sentiment before voting, while post-poll surveys analyze voter motivations after elections.