Select the word with the correct spelling.
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In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.
Ruse
Optical fibre works on which of the following principle of light?
_____ mirror is used in the headlights of cars.
Which one of the following countries is not a member of the "BRICS" group?
What does BOD5 refer to?
In the following question, out of the four alternatives, select the word similar in meaning to the word given.
Cantankerous
Through photosynthesis at least a half of the total carbon dioxide fixation on earth is carried out by?