In the following questions, a grammatically correct and meaningful sentence is given which is divided into four parts namely (A) ,(B) ,(C) and (D) You have to arrange the four parts to make a contextually and grammatically meaningful sentence. If no such rearrangement is possible mark (e) as your answer i.e. 'No rearrangement required'.

Jaigarh fort was built by (A) / and was named after him (B) / Sawai Jai Singh to protect the (C) / Amer Fort and its palace complex (D)

The correct option is ACDB.

To arrange the given sentence fragments into a contextually and grammatically coherent sentence, let us analyze each part and how they link together logically:

1. Part (A): "Jaigarh fort was built by"
This introduces the subject of the sentence ("Jaigarh fort") and the passive verb phrase ("was built by"). A passive construction like "built by" requires a agent/person to follow it.

2. Part (C): "Sawai Jai Singh to protect the"
This specifies the person who built the fort ("Sawai Jai Singh"). Thus, part (C) logically and grammatically follows part (A): "Jaigarh fort was built by Sawai Jai Singh to protect the...".

3. Part (D): "Amer Fort and its palace complex"
The phrase ending in "protect the" requires an object representing what is being protected. Part (D) provides this object: "...to protect the Amer Fort and its palace complex...".

4. Part (B): "and was named after him"
This clause provides additional information about the fort being named after Sawai Jai Singh ("him"). Connecting this to the end of part (D) completes the sentence seamlessly.

Combining these parts in the order A → C → D → B yields the complete, meaningful sentence:

"Jaigarh fort was built by Sawai Jai Singh to protect the Amer Fort and its palace complex and was named after him."

Therefore, the correct sequence is ACDB.