In Duvall's eight development stages of a family life cycle, couples come under?

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 220-222
Practise the full AIIMS BBSR SNO - 2019
Attempt every question from this paper in a timed mock, then review the full solution for each one.