Step 1: Recall the facts:
Recall that the scheme started in 1995 on Independence Day.
Step 2: Match the facts with the options:
Option (1): The year 1996 is one year too late, so this is wrong.
Option (2): The date 2 October is not the launch day, so this is wrong.
Option (3): 15 August 1995 is the recorded launch date, so this is right.
Option (4): Both the date and the year are wrong here.
Step 3: Decide:
Only 15 August 1995 agrees with the official launch of the scheme.
Final Answer:
Option (3) is correct. \[\boxed{\text{15 August 1995}}\]