Fill in the blank with the correct adverb clause:______ Dadaji’s Amba…

The correct answer is Option (4) → Though it is more than forty years old,

Adverb clause of concession:

• An adverb clause of concession tells that something happens in spite of something else. It begins with though, although or even though.
• Complete sentence: Though it is more than forty years old, Dadaji’s Ambassador car still starts at the very first try.
• An old car is expected to give trouble, but this one does not. So the clause shows a contrast. The main clause after it does not take “but”.

Why the Other Options are Incorrect?

Option 1: Though it more than forty years old, — Incorrect. The option has no verb. “It more than forty years old” needs “is”. Without a verb it is not a clause.

Option 2: In spite it is more than forty years old, — Incorrect. “In spite” is always used as “in spite of”, and it is followed by a noun or an -ing word, not by a clause. Example: We went out in spite of the heat.

Option 3: Though it is more than forty years old, but — Incorrect. The option uses “though” and “but” together. “Though” already joins the two clauses, so the extra “but” is wrong.