**Question:** Insulin resistance is seen in all, except-

A. Diabetic ketoacidosis
B. Hyperthyroidism
C. Pregnancy
D. Malabsorption syndromes

**Core Concept:**
Insulin resistance is a condition where the body cells do not respond appropriately to insulin, resulting in elevated blood glucose levels. Insulin is a hormone produced by the pancreas that helps regulate blood glucose levels by promoting glucose uptake into cells, enabling them to use glucose for energy or store it for later use. Insulin resistance occurs when cells become less responsive to insulin, leading to a compensatory increase in insulin secretion by the pancreas.

**Why the Correct Answer is Right:**
Diabetic ketoacidosis (DKA) is a severe complication of diabetes mellitus, specifically type 1 diabetes. In DKA, the body is unable to produce insulin, leading to high blood glucose levels and the body breaking down fats for energy. This process produces ketones, which cause acidosis and lead to the characteristic symptoms of DKA. Since insulin is not deficient in DKA, insulin resistance is not a primary feature.

**Why Each Wrong Option is Incorrect:**
In hyperthyroidism (B), the thyroid gland produces excess thyroid hormones, leading to increased glucose production and reduced glucose uptake by cells. This results in low blood glucose levels, not insulin resistance.

In pregnancy (C), insulin resistance is a physiological adaptation that occurs for the needs of the growing fetus. Although insulin resistance is present, it is not considered a "exception" to the general rule and is considered a normal adaptation.

In malabsorption syndromes (D), the body is unable to absorb glucose from the diet due to conditions like celiac disease, Crohn's disease, or certain medications. Insulin resistance is not present in these cases as the primary issue is with glucose absorption, not insulin action.

**Clinical Pearl:**
Insulin resistance is a common feature in various conditions like obesity, type 2 diabetes mellitus (T2DM), polycystic ovary syndrome (PCOS), and non-alcoholic fatty liver disease (NAFLD). Understanding the concept of insulin resistance is essential for recognizing and managing these conditions. Adequate knowledge of insulin resistance aids in differentiating between primary insulin deficiency (in T1DM) and insulin resistance (in T2DM) and in diagnosing secondary causes of hyperglycemia, such as DKA in T1DM patients.