This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
A midwife at a PHC did per vaginal examination of a women in labor with 8 cm cervical dilation and 70% cervical effacement with the fetal head at +1 station. This +1 station implies the position of fetal head is- 
Select and explain. 
A. 1 cm above the ischial spine, B. 1 cm below the ischial spine, C. At the level of ischial spine, D. 1 cm below the cervical os
B: 1 cm below the ischial spine
Answer: B: 1 cm below the ischial spine 
Explanation: Answer-B. 1 cm below the ischial spineStation describes descent of the fetal biparietal diameter in relation to a line drawn between maternal ischial spines. Thus+1 station implies fetal head is 1 cm below the ischial spine.