Answer: [Option (b)] Only two statements
The TN-KET initiative began in April 2022 in 2,500-odd public healthcare facilities that diagnosed TB in 30 districts, not in all public healthcare facilities in Tamil Nadu. Therefore, statement 1 is incorrect.
This statement 2 is correct.
The differentiated TB Care guidelines require comprehensive assessment of 16 clinical, laboratory and radiological parameters, not only three conditions. Therefore, statement 3 is incorrect.
This statement 4 is correct.
Therefore, only statements 2 and 4 are correct, making option (b) the correct answer.