Answer:
Correct option is (C) 0.0177
Solution:
1.00 m aqueous solution means 1 mole of solute in 1 kg of water.
1 kg of water corresponds to ${1000\over18}=55.56$ moles.
The mole fraction of solute is ${1\over1+55.56}=0.0177$.
Hence, the correct option is (C) 0.0177