FIA

The Mosque of the Prophet (PBUH) was damaged by fire during the caliphate of Hazrat Ameer Muawiya. The other options do not correspond to the period when the fire occurred.

Hazrat Abu Bakr (RA) died in the 11th year of Hijrah, which is historically well documented. Therefore, option B is correct.

The word 'listless' means lacking energy, enthusiasm, or interest, often showing a spiritless or indifferent attitude. Among the options, 'indifferent' is the closest synonym as it conveys a lack of interest or concern. The other options do not match the meaning: 'Owe' means to be under obligation, 'Eager' means enthusiastic or keen, and 'Clear' means transparent or obvious. Therefore, 'indifferent' is the best synonym for 'listless' in this context.

The age of the Solar System is widely accepted by scientists to be about 4.5 billion years, based on radiometric dating of meteorites and lunar samples.

The most abundant elements in seawater are sodium and chloride, which combine to form sodium chloride (common salt). These ions are the primary contributors to seawater's salinity.

The claim that Japan was the only country whose population decreased by 79 thousand in 2009 is not supported by available data. Multiple countries, especially in Eastern Europe such as Latvia, Lithuania, and others, experienced significant population declines around that period due to low birth rates, high death rates, and emigration. Japan has experienced population decline in recent years, but the specific figure of a 79 thousand decrease in 2009 is not uniquely attributable to Japan, nor was it the only country with such a decline. Therefore, the correct answer is 'D' (None of these), as none of the listed countries uniquely fits the description for 2009.

In 2016, the United States was the world's largest economy with a nominal GDP of approximately $18.6 trillion. China was the second largest economy with a GDP of about $11.2 trillion. Therefore, China did not become the biggest economy in 2016. The question as posed is flawed because the correct answer (United States) is not listed among the options. Among the given options, China was the second largest economy in 2016, but it was not the biggest. The question should be corrected to reflect that the United States was the biggest economy in 2016, or the options should include the United States to be accurate.

Jahangir, the Mughal emperor, died after a sudden fall from the stairs, which led to his death. Babur and Humayun died of natural causes, making Jahangir the correct answer.

The speed of sound in dry air at 20°C is approximately 330 meters per second, which is a well-established physical fact.

The Badshahi Mosque in Lahore was built by the Mughal emperor Aurangzeb between 1671 and 1673. This is confirmed by multiple authoritative sources including Wikipedia and Britannica. Therefore, the correct answer is Aurangzeb, which corresponds to option B. The original question had the correct answer set to D ('None of these'), which is incorrect and has been corrected to B.