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: How old was Nusslein-Volhard when she won the Nobel Prize in Physiology and Medicine? Passage:The concept of the morphogen has a long history in developmental biology, dating back to the work of the pioneering Drosophila (fruit fly) geneticist, Thomas Hunt Morgan, in the early 20th century. Lewis Wolpert refined the morphogen concept in the 1960s with the French flag model, which described how a morphogen could subdivide a tissue into domains of different target gene expression (corresponding to the colours of the French flag). This model was championed by the leading Drosophila biologist, Peter Lawrence. Christiane Nusslein-Volhard was the first to identify a morphogen, Bicoid, one of the transcription factors present in a gradient in the Drosophila syncitial embryo. She was awarded the 1995 Nobel Prize in Physiology and Medicine for her work explaining the morphogenic embryology of the common fruit fly. Groups led by Gary Struhl and Stephen Cohen then demonstrated that a secreted signalling protein, Decapentaplegic (the Drosophila homologue of transforming growth factor beta), acted as a morphogen during the later stages of Drosophila development.
 Links: a. Christiane Nüsslein-Volhard b. Lewis Wolpert c. Lewis Wolpert d. Transcription factor

Ex Output:
a


Ex Input:
Question: What is the average temperature of the body of water where the frontal low developed? Passage:A tropical disturbance moved westward offshore Nicaragua and was declared Tropical Depression Twenty-Four on October 15.. During the early afternoon of the next day, ship reports indicated the formation of a tropical depression close to land. The cyclone moved at a quick pace towards the west-northwest south of a warm-core ridge. Early on the morning on October 16, Roslyn became a tropical storm. By the morning of the October 17, Roslyn had developed into a hurricane south of Acapulco. A vigorous upper trough was deepening offshore Baja California, and Roslyn began to re-curve within a few hundred miles of Manzanillo. The system struck Mazatlán as a marginal hurricane on October 20. The low-level center rapidly dissipated, although a frontal low developed in the western Gulf of Mexico, which moved over southeastern Texas and later through the Mississippi Valley. The original upper-level circulation maintained its northeast movement, bringing rainfall to the Southeastern United States.
 Links: a. Mazatlán b. Acapulco c. Nicaragua d. Gulf of Mexico

Ex Output:
d


Ex Input:
Question: What year had the touring team Murrills played against in 1976 been established? Passage:Murrills made his first-class debut for Cambridge University against Warwickshire. He made 34 further first-class appearances for Cambridge, the last of which came against Oxford University in 1976. In his 35 appearances for the university, he scored 900 runs at an average of 14.75, with a high score of 67. This score, which was one of three fifties he made, came against Surrey in 1976. He also appeared twice in first-class cricket for a combined Oxford and Cambridge Universities team, in 1974 against the touring Indians and in 1976 against the touring West Indians. His debut in List A cricket came for Cambridge University in the 1974 Benson and Hedges Cup against Kent, with him making three appearances in that season's competition. In the 1976 Benson and Hedges Cup he made four appearances for the Combined Universities.
 Links: a. Batting average (cricket) b. Kent County Cricket Club c. Oxford and Cambridge Universities cricket team d. West Indies cricket team

Ex Output:

d