In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.
Efficacious
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In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.
A dime a dozen
Be in two minds
Atomic number of an atom gives the number of which of the following ?
Haemoglobin has the highest affinity with which of the following?
In mammals, an important role of excretion is played by________
Lichen is an association between which of the two ?
All respiratory equipment must be approved byl
The National Institute for Occupational Safety and Health (NIOSH) will approve all respiratory equipment.