This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in obstetrics, Subject name: Gynaecology & Obstetrics
consider the following: 1. Reactive NST 2. Absence of deceleration 3. Sinusoidal pattern Which of the above findings in an antepaum CTG indicate fetal well-being: 
Select and explain. 
A. 1 and 2 only, B. 2 and 3 Only, C. 1 and 3 only, D. 1.2,3
A: 1 and 2 only
Answer: A: 1 and 2 only 
Explanation: A reactive NST is defined as the presence of two or more fetal hea rate acceleration during a 20 min period,with acceleration of 15 beats or more and lasting 15 or more second.No late deceleration or significant variable deceleration also indicates good cardiac activity. refer pgno:510 sheila textbook of obstetrics 2 nd edition