In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.
A substance that has no therapeutic effect, used as a control in testing new drugs.
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In an optical fibre the signal is transmitted
While watching 3D movies at the theater, we have to wear special glasses because?
The members of the All India Services serve the
Who was the first lady Governor of an Indian State?
Arrest of _________ in 1930 led to angry demonstrations in streets of Peshawar.
Constituent Assembly of India was founded in the year ________.
What is the capital of Austria?