The correct answer is Itanagar, the capital of Arunachal Pradesh. Itanagar serves as the administrative and legislative headquarters of Arunachal Pradesh, housing the state secretariat, the Legislative Assembly, and the offices of the Governor and Chief Minister. Notably, Itanagar takes its name from the Ita Fort ('fort of bricks'), a 14th-century citadel located in the city, and Arunachal Pradesh is the largest state by area in Northeast India and shares an international border with China, Bhutan, and Myanmar. The other options given in this Arunachal Pradesh question are capitals of different Indian states, and candidates often confuse them because Static GK questions on state capitals are frequently tested together in a single set. Mumbai is the capital of Maharashtra, not Arunachal Pradesh. Gandhinagar is the capital of Gujarat, not Arunachal Pradesh. Shimla is the capital of Himachal Pradesh, not Arunachal Pradesh. None of these cities administers Arunachal Pradesh; only Itanagar holds that constitutional status. Competitive exams such as SSC CGL, SSC CHSL, State PSC, and Railway exams often feature an Arunachal Pradesh question like this one on Itanagar, which shows why questions on Indian state capitals are considered high-scoring, since they test direct factual recall rather than complex reasoning. Remember Itanagar as the capital of Arunachal Pradesh, and clearly distinguish it from the distractor capitals used here — Mumbai, Gandhinagar, Shimla — to avoid marking the wrong answer under exam-time pressure.