Correct Answer :
C. Bright : Gloomy
The relationship between the given words is of antonyms: limpid refers to clear and bright, whereas murky means dark or gloomy. So, its easy to see that option (c) is correct. Option (a) is wrong, because dazed refers to a state of confusion or a state of mental numbness, whereas cloudy refers to something that is not clear. Option (d) is wrong, because nebulous means lacking definition or form whereas dim means not bright or lacking light.