Which lamp is the brightest? Lamp A is less bright than Lamp B Lamp B is brighter than Lamp C Lamp C is as bright as Lamp D Lamp B is brighter than Lamp D Lamp D is brighter than Lamp A
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A
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B
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C
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D
From the brightness comparisons: B > C, C = D, B > D, D > A. This means B is brighter than C and D, and D is brighter than A. Since B > D > A and B > C, Lamp B is clearly the brightest. Lamp C is equal to D, and Lamp A is the least bright. The answer is B.
To answer this question, let's analyze the given statements about the brightness of each lamp:
Lamp A is less bright than Lamp B. Lamp B is brighter than Lamp C. Lamp C is as bright as Lamp D. Lamp B is brighter than Lamp D. Lamp D is brighter than Lamp A.
Based on these statements, we can determine the following brightness relationships:
Lamp B is brighter than Lamp A, as stated in the fourth statement. Lamp B is brighter than Lamp C, as stated in the second statement. Lamp C is as bright as Lamp D, as stated in the third statement.
From these relationships, we can conclude that Lamp B is the brightest among all the lamps.
Let's go through each option to understand why it is correct or incorrect:
Option A) A - This option is incorrect because Lamp B is brighter than Lamp A. Option B) B - This option is correct because Lamp B is indeed the brightest among all the lamps. Option C) C - This option is incorrect because Lamp B is brighter than Lamp C. Option D) D - This option is incorrect because Lamp B is brighter than Lamp D.
Therefore, the correct answer is B. Lamp B is the brightest.