The correct answer is option-2. The statement that the scheme was launched in the year 2015 is not correct. Pradhan Mantri Ujjwala Yojana (PMUY) was actually launched on May 1, 2016, by the Honorable Prime Minister of India, Shri Narendra Modi.

Option-1 is correct as PMUY is a social welfare scheme aimed at providing LPG connections to households below the poverty line (BPL). This is done to eliminate the use of harmful cooking fuels like wood and coal, which have adverse health effects.

Option-3 is correct as the Government of India has set a target of providing 5 crores LPG connections under the Ujjwala Yojana. This target was achieved in August 2019, and the government has now expanded the scheme to provide another 1.5 crore LPG connections.

Option-4 is also correct. The primary objective of PMUY is to safeguard the health of women and children by providing them with access to clean cooking fuel, which in turn reduces indoor air pollution and associated health problems.

Overall, all options except for option-2 are correct in describing the Pradhan Mantri Ujjwala Yojana.