Correct option is A
Insulin injections are primarily used for Type I Diabetes Mellitus, where the body fails to produce insulin due to an autoimmune attack on pancreatic beta cells. Type II Diabetes is usually managed with oral medications, but in some severe cases, insulin may also be required.
Explanation of Each Option:
· Type I Diabetes Mellitus: Correct answer; caused by insulin deficiency, requiring insulin injections for survival.
· Type II Diabetes Mellitus: Mostly managed with oral medications; insulin is only needed in advanced cases.
· Type III Diabetes Mellitus: Incorrect; Type III Diabetes is not a standard medical classification.
· Both Type I and Type III Diabetes Mellitus: Incorrect, as Type III Diabetes is not a recognized condition.