Explain why answer is option a

Dear Student, Insulin is produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, skeletal muscles and fat tissue to absorb glucose from the blood. In the liver and skeletal muscles, glucose is stored as glycogen, and in fat cells (adipocytes) it is stored as triglycerides. So, as per the graphs C and D, they are not at related as amount of sugar is not constant (C) and further we get sugar from roti (D). Therefore both the graphs are incorrectly representing relation. In case of graph 1 (A), sugar is direct form of glucose, so as the function of insulin is to maintain the glucose levels, initially upon consumption of sugar, insulin levels are high and decreases as sugar is getting consumed/utilised by the body. Also, roti, is not direct source of carbohydrates, first it needs to broken down therefore, as consumption increases (or break down taking place after eating) with time the insulin activity increases. On the other hand, it is not the case in graph B. Hence, option A is correct.