Step 1: Line up the committees by their real job.
Four Indian health planning committees are listed. Each one is remembered in public health teaching for one main outcome.
Step 2: Chadah Committee, 1963.
It told the malaria surveillance workers, who were already visiting villages, to also handle family planning tasks. This is item 1.
Step 3: Jungalwalla Committee, 1967.
Its whole purpose was integrating health services across all levels of the system, from top administrators down to field workers. This is item 2.
Step 4: Kartar Singh Committee, 1973.
It combined the many separate vertical programme workers into a single multipurpose health worker. This is item 4.
Step 5: Shrivastav Committee, 1975.
It set up village level Health Guides as community volunteers. This is item 3.
Step 6: Conclude.
So the pairing is A-3, B-1, C-4, D-2. This differs from the answer marked in the source paper, but it is the pairing that matches each committee's documented history, so it is treated as the correct code here.