Perineal injury can be prevented in vaginal delivery by all except :

Prevention of perineal laceration Delivery by early extension avoided: flexion of the subocciput comes under the symphysis pubis so that lesser suboccipito-frontal 10 cm diameter emerges out of introitus Spontaneous forcible delivery of head is to be avoided by assuring patient not to bear down during contractions To deliver head in between contractions To perform timely episiotomy To take care at delivery of shoulders D.C.DUTTA'S TEXTBOOK OF GYNECOLOGY, Pg no:137,7th edition