Correct Answer: B

Rationale: The correct answer is B because the absence of any other abnormal findings suggests that Mr. Thornton is currently experiencing an anterior wall infarction. This is indicated by the localized area of myocardial necrosis due to prolonged ischemia. Option A is incorrect because ischemia would typically present with reversible changes rather than necrosis. Option C is incorrect as NSTEMI would show some abnormal findings. Option D is incorrect as STEMI would show more significant ECG changes and enzyme elevation. In summary, the absence of other abnormalities points towards an acute event like an anterior wall infarction.

Correct Answer: D

Rationale: The correct answer is D: Escherichia coli. E. coli is the most common causative organism of pyelonephritis due to its prevalence in the gastrointestinal tract. It has specific virulence factors that enable it to ascend the urinary tract and cause infection. Streptococcus faecalis, Proteus vulgaris, and Staphylococcus pyogene are less commonly associated with pyelonephritis compared to E. coli.

Correct Answer: C

Rationale: The correct answer is C: Multiple gestation. Preterm birth is more common in multiple gestation pregnancies due to the increased strain on the mother's uterus and cervix. This can lead to early labor and delivery. Social habits (choice A) and genetic factors (choice B) may play a role in preterm birth but are not highly associated. Chronic conditions (choice D) can also contribute to preterm birth, but multiple gestation is a stronger predictor.

Correct Answer: B

Rationale: The correct answer is B: Within the first week of birth. Classical vitamin K deficiency bleeding typically occurs within the first week of birth due to low levels of vitamin K in newborns. During this time, infants are at a higher risk of bleeding complications if not supplemented with vitamin K. Choice A is incorrect because bleeding usually occurs after the first 24 hours. Choice C is incorrect as it does not specify a specific time frame within the neonatal stage. Choice D is incorrect as classical vitamin K deficiency bleeding is typically seen within the first week, not necessarily during the entire infancy stage.

Correct Answer: B

Rationale: The correct answer is B: FALSE. In mild preeclampsia, the mother may have symptoms such as mild hypertension, proteinuria, and sometimes mild edema. This indicates that the mother does have complaints, albeit they may be mild. The other choices (A, C, D) are incorrect because in mild preeclampsia, the mother does have complaints, so option A is not true. Options C and D are not applicable as they do not provide any information.