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Social & Preventive Medicine General 05dc164e

The influence of maternal smoking and LBW incidence is studied. Detailed smoking history is taken at first antenatal visit and smoking history and birth weight were studied later. The type of study is

A
Retrospective cohort study
B
Cross sectional study
C
Clinical trial
D
Prospective cohort study
High-Yield Explanation
No explanation provided.

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