FIA

The phrase 'to pay off old scores' means to get revenge or settle a past grievance, which aligns with option C, 'Revenge.' The other options do not fit the idiomatic meaning of the phrase.

The verb 'registered' correctly fits the sentence to indicate that exports have experienced a significant increase. 'Projected' refers to future estimates, 'restrained' means limited or controlled, which contradicts 'phenomenal rise', and 'None of these' is incorrect as 'registered' is appropriate.

Euclid was an ancient Greek mathematician known as the 'Father of Geometry' for his work in the field of geometry, making option C the correct answer.

The book "The Indus Saga and the Making of Pakistan" is authored by Aitzaz Ahsan, a senior Pakistani lawyer, politician, and intellectual. Multiple reliable sources including Goodreads, Amazon, and publisher information confirm Aitzaz Ahsan as the author. Therefore, option B is correct, and the original answer stating R.L. Stephenson as the author is incorrect.

Pakistan Steel Mills is the largest industrial unit in the public sector of Pakistan, known for its significant production capacity and scale compared to other listed options.

In Islamic law, 'Fatrana' refers to the maintenance expenses of minor children, which are the responsibility of the father. The father is obligated to provide for the child's needs until they reach maturity.

Warren Buffett is famously known for earning his wealth primarily through investing in the stock market and managing Berkshire Hathaway, a multinational conglomerate holding company. Therefore, 'Stock Exchange' is the correct answer.

A person who studies rocks and soils is called a geologist. Botanists study plants, and archaeologists study human history through artifacts, so the correct answer is Geologist.

The sequence is: 3, 12, 27, 48.75, 108, ?. The pattern can be identified by examining the differences between consecutive terms (assuming the 4th term is 48, not 48.75, as found in multiple verified sources). The differences between terms are increasing by 6 each time: 12 - 3 = 9, 27 - 12 = 15, 48 - 27 = 21, 75 - 48 = 27, 108 - 75 = 33. The next difference should be 33 + 6 = 39. Adding this to the last term 108 gives 108 + 39 = 147. Therefore, the next number in the sequence is 147, which corresponds to option A. The original explanation was inconsistent and the subject was incorrectly labeled as Pakistan Studies; it should be Mathematics or Number Sequences.

The prefix "micro" originates from the Greek word "mikrós," meaning "small." In the metric system, "micro" denotes a factor of one millionth (10^-6) of a unit. Therefore, "micro" means one millionth part, not a thousandth or hundredth part. Among the given options, the correct meaning of "micro" is "A million part."