You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Q: Animals get energy for growth and repair from  
 (A) soil (B) food (C) water (D) air

A: B
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Q: When oxygen combines with hydrogen, which substance is formed?  
 (A) water (B) vinegar (C) hydrochloric acid (D) hydrogen dioxide

A: A
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Q: Which of these elements is likely to be found in an organic compound?  
 (A) helium (B) hydrogen (C) mercury (D) tin

A:
B
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