Answer: (C) Two

Explanation: The original number is 5734629. When digits are arranged in ascending order, we get 2345679. Comparing positions:

• Position 1: 5 vs 2 → different
• Position 2: 7 vs 3 → different
• Position 3: 3 vs 4 → different
• Position 4: 4 vs 5 → different
• Position 5: 6 vs 6 → same
• Position 6: 2 vs 7 → different
• Position 7: 9 vs 9 → same

Thus, two digits (6 and 9) remain in the same position.