Conduct - organize and carry out.
Fight - struggle to overcome, eliminate, or prevent.
Hold - grasp, carry, or support with one's hands.
Originate - have a specified beginning.
The given sentence mentions the survey on the government schemes. Filling the blank with 'conduct' gives the meaning that the committee is about to carry out a survey on the government schemes.
Other options render the sentence meaningless.
The correct sentence is: The committee will conduct a survey on the government schemes.
Hence, option (a) is the answer.