Below shown head control is achieved by

In the above image, Infant lifts head from the supine position when about to be pulled at 5 months Supine and pull to sit:The infant is observed in supine and then gently pulled to sitting position. Control of head and curvature of the spine is observed. In the newborn period, the head completely lags behind and back is rounded.Staing at 6 weeks, the head control develops and by 12 weeks there is only a slight head lag. The spine curvature also decreases accordingly.The child has complete neck control by 20 weeks. This can be asceained by swaying him gently &;side-to-side&; when sitting. At this age, the baby loves to play with his feet and may take his foot to mouth as well. Infant lifts head from the supine position when about to be pulled at 5 months.Ref: Paediatrics; O.P. Ghai; 8th edition; Page no: 43