The correct answer is: None of these.
The Annapurna Scheme is a government of India scheme that provides foodgrains at a highly subsidized rate to the poorest of the poor, who are unable to work and do not have any other source of income. The scheme was launched in 1995 and is implemented by the Ministry of Food and Public Distribution.
The National Old Age Pension Scheme (NOAPS) is a social security scheme for the elderly in India. The scheme was launched in 2007 and is implemented by the Ministry of Social Justice and Empowerment. The scheme provides a monthly pension of Rs. 200 to all eligible persons aged 60 years and above.
The Pradhan Mantri Ujjwala Yojana (PMUY) is a government of India scheme that aims to provide free LPG connections to poor households. The scheme was launched in 2016 and is implemented by the Ministry of Petroleum and Natural Gas. The scheme has so far provided free LPG connections to over 8 crore households.
The Integrated Rural Development Programme (IRDP) is a government of India scheme that aims to provide financial assistance to rural poor for income generation activities. The scheme was launched in 1978 and is implemented by the Ministry of Rural Development. The scheme has so far provided financial assistance to over 50 crore rural households.
As you can see, none of the options given in the question are correct. The government has not merged the Annapurna Scheme with any other scheme.