Exp) Option b is the correct answer.

Janani Suraksha Yojana was launched in April 2005 by modifying the National Maternity Benefit Scheme (NMBS). The NMBS came into effect in August 1995 as one of the components of the National Social Assistance Programme (NSAP).

Statement 1 is incorrect: Janani Suraksha Yojana (JSY) is a safe motherhood intervention under the National Health Mission (NHM). Janani Suraksha Yojana (JSY) is a safe motherhood intervention under the National Rural Health Mission (NHM). It is not the intervention of the State Health Departments.

Statement 2 is correct: The main objectives of JSY are to reduce maternal and neo-natal mortality. It is being implemented with the objective of reducing maternal and infant mortality by promoting institutional delivery among pregnant women. The scheme is under implementation in all states and Union Territories (UTs), with a special focus on Low Performing States (LPS).

Statement 3 is correct: Launched with the objective of reducing maternal and neonatal mortality. Janani Suraksha Yojana (JSY) promotes institutional delivery among pregnant women especially with weak socio-economic status i.e. women from Scheduled Castes, Scheduled Tribes and BPL households.

Statement 4 is incorrect: All pregnant women and infants will get free treatment benefits at public health institutions. The objective doesnot includes providing public health facilities to sick infants up to one year of age.

Source: https://pib.gov.in/PressReleasePage.aspx?PRID=1575157 https://nhm.gov.in/index1.php?lang=1&level=3&lid=309&sublinkid=841 https://vikaspedia.in/health/nrhm/national-health-programmes-1/janani-suraksha-yojana