FIA

The 33rd ASEAN Summit was held in Singapore. This is a well-documented fact from recent ASEAN meetings, confirming Singapore as the host country for this summit.

Vitamin D deficiency leads to rickets, a disease characterized by softening and weakening of bones in children, due to impaired calcium absorption. Measles and scurvy are caused by other factors (measles is a viral infection; scurvy is due to vitamin C deficiency).

The headquarters of ASEAN (Association of Southeast Asian Nations) is located in Jakarta, Indonesia. This is the official and well-known location of ASEAN's main secretariat.

Venus is the brightest planet visible from Earth and is easily seen with the naked eye, often called the 'Evening Star' or 'Morning Star'. Saturn and Jupiter are visible but not as easily or as brightly as Venus. 'None of these' is incorrect because Venus is clearly visible.

Khewra Salt Mine is located in the Punjab province of Pakistan, making option A the correct answer. It is one of the largest and oldest salt mines in the world, situated near the city of Jhelum in Punjab.

Sound waves are longitudinal waves because the particle displacement is parallel to the direction of wave propagation, causing compressions and rarefactions in the medium.

The correct verb to complete the sentence is 'deliberated,' which means the jury members discussed or considered something carefully. 'Deferred' means to postpone, and 'adjourned' means to suspend proceedings, neither fitting the context as well as 'deliberated.'

The Federal Investigation Agency (FIA) of Pakistan is headed by a Director General (DG), who is the chief executive officer responsible for overall management and operations.

The official currency of Russia is the Russian Ruble. The other options listed are currencies of different countries or incorrect terms.

Abu Huraira accepted Islam in the 6th year of Hijri, which is historically documented. Therefore, option A is correct.