Explanation:

Lok Sabha is not a continuing chamber. Its normal term is five years from the date of its first meeting after the general elections, after which it automatically dissolves.
However, the President is authorised to dissolve the Lok Sabha at any time even before the completion of five years and this cannot be challenged in a court of law.
Further, the term of the Lok Sabha can be extended during the period of national emergency be a law of Parliament for one year at a time for any length of time. However, this extension cannot continue beyond a period of six months after the emergency has ceased to operate.