In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Ex Input:
Question: When was the man whose name is used as the unit of radio wave frequency born? Passage:A modulated radio wave, carrying an information signal, occupies a range of frequencies. See diagram. The information (modulation) in a radio signal is usually concentrated in narrow frequency bands called sidebands (SB) just above and below the carrier frequency. The width in hertz of the frequency range that the radio signal occupies, the highest frequency minus the lowest frequency, is called its bandwidth (BW). A given amount of bandwidth can carry the same amount of information (data rate in bits per second) regardless of where in the radio frequency spectrum it is located, so bandwidth is a measure of information-carrying capacity. The bandwidth required by a radio transmission depends on the data rate of the information (modulation signal) being sent, and the spectral efficiency of the modulation method used; how much data it can transmit in each kilohertz of bandwidth. Different types of information signals carried by radio have different data rates. For example, a television (video) signal has a greater data rate than an audio signal.
Links: a. Data signaling rate b. Carrier wave c. Hertz d. Audio signal

Ex Output:
c

Ex Input:
Question: Is the jail where Abani escaped from still in operation? Passage:In 1914, Mukherji met Rash Behari Bose and joined the revolutionary movement. In 1915, he was sent to Japan to acquire weapons for the revolutionaries. According to British intelligence reports, he was active in the HinduGerman conspiracy. In September 1915, while on his return journey to India, he was arrested in Singapore and incarcerated at the Fort Canning prison there, where he remained until he escaped in the autumn of 1917. The exact details of his escape are unclear. Mukherji managed to reach Java in the Dutch East Indies, where he stayed until the end of 1919, living under the name of Dar Shaheer. In Java, he was in contact with Indonesian and Dutch revolutionaries and became a communist. He also travelled to Amsterdam and back. In Amsterdam, he met S.J. Rutgers, who recommended him as a delegate to the Second Congress of the Communist International.
Links: a. Amsterdam b. S. J. Rutgers c. Communist International d. Fort Canning Hill

Ex Output:
d

Ex Input:
Question: When did the general who took Alexander the Great's body back to Memphis die? Passage:Aegae or Aigai (), also Aegeae or Aigeai (), was a city in Emathia in ancient Macedonia, and the burial-place of the Macedonian kings. The commanding and picturesque site upon which the town was built was the original centre of the Macedonians, and the residence of the dynasty which sprang from the Temenid Perdiccas. The seat of government was afterwards transferred to the marshes of Pella, which lay in the maritime plain beneath the ridge through which the Lydias forces its way to the sea. But the old capital always remained the national hearth (, Diod. Excerpt. p.563) of the Macedonian race, and the burial-place for their kings. The body of Alexander the Great, though by the intrigues of Ptolemy I Soter, it was taken to Memphis, was to have reposed at Aegae, the spot where his father Philip II of Macedon fell by the hand of Pausanias of Orestis.
Links: a. Ptolemy I Soter b. Ptolemy I Soter c. Alexander the Great d. Alexander the Great

Ex Output:
a