Step 1: Start from the one we are sure about.
The Red Fort is a Mughal monument of the 17th century. Every other fort in the list is much older. So A must be last, and any option that does not end with A can be dropped.
Step 2: Remove options by the last letter.
Option 1 ends with C, option 2 ends with D and option 3 ends with C. Only option 4 ends with A. So option 4 is the only one that keeps the Red Fort last.
Step 3: Confirm the first place.
Option 4 puts Kangra Fort first. Kangra is considered among the oldest forts of India, with a very long history tied to the Katoch rulers, so this agrees with the usual account.
Step 4: Confirm the middle places.
Option 4 puts Chittorgarh before Gwalior. Chittorgarh is dated to about the 7th century and Gwalior is dated a little later in the common list, so the middle order holds.
Step 5: Write the full order.
Kangra Fort, Chittorgarh Fort, Gwalior Fort and then Red Fort. In letters this is C, B, D, A, which is option 4.
Step 6: Why the other options fail.
Option 1 starts with the Red Fort and ends with Kangra, which is the exact reverse of the true idea. Option 2 ends with Gwalior, so it puts the Red Fort in the third place, which cannot be right for a 17th century fort. Option 3 puts the Red Fort second. Each of these breaks the rule that the Red Fort is the newest.
Final Answer:
Only option 4 keeps the Red Fort last and the older forts in the right order.
\[ \boxed{\text{Option 4: C, B, D, A}} \]