Question

Remains of the tomb of the Ottoman sultan who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, Suleiman the Magnificent, is believed to be found recently.

• A. the Ottoman sultan Suleiman the Magnificent, who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, is believed to be found recently
• B. the Ottoman sultan Suleiman the Magnificent, who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, is believed as being found recently
• C. Suleiman the Magnificent, the Ottoman sultan who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, is believed to have been found recently.
• D. Suleiman the Magnificent, the Ottoman sultan who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, are believed to have been found recently

Answer 1

The correct option is D Suleiman the Magnificent, the Ottoman sultan who died in 1566 while his troops were besieging the fortress of Szigetvar in Hungary, are believed to have been found recently

In the given sentence, the noun phrase ‘Suleiman the Magnificent’ is misplaced. This error is corrected in all given answer options.
Also note that ‘to be found’ is incorrect. The correct tense to use is the present perfect form, i.e. ‘to have been found’.
The subject of the sentence is ‘remains of the tomb’. As ‘remains’ is plural, the correct verb to follow it is ‘are’.