This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
25 years old 2nd gravida with B negative blood group reaches in labour room in full dilatation. All the following norms to be followed except 
Select and explain. 
A. Cord blood to be saved in 2 l - plain & EDTA l, B. Early clamping of cord, C. Avoidance of manual removal of placenta, D. Liberal prophylactic use of ergometrine
D: Liberal prophylactic use of ergometrine
Answer: D: Liberal prophylactic use of ergometrine 
Explanation: Use of ergot derivatives is contraindicated in Rh negative mother to avoid chances of feto-maternal micro transfusions. ref Katzung 12 th ed.