This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
A 28-year-old lady has put on weight (10 kg over a period of 3 years), and has oligomenorrhea! followed by amenorrhea for 8 months. The blood pressure Is 160/100 mm of Hg. Which of the following Is the most appropriate investigation ? 
Select and explain. 
A. Scrum electrolytes, B. Plasma Coisol, C. Plasma testosterone and ultrasound evaluation of pelvis, D. T3,T4andTSH
D: T3,T4andTSH
Answer: D: T3,T4andTSH 
Explanation: In above case the paitent shows the symptoms of hypothyroidism and is in the most affecting age group of females . So a thyroid hormone assay is the most approrpiate investigation . Features of Hypothyroidism Ref - Davidson 23e p637