Ans ; A,B,C,D ALL ARE RIGHT,
let x gr water is evaporated, then water present after evaporation is 10% of 100-x
so wt of water now is calculated from: 10 = (w/100-x) X 100
and we know w + 40+41 = 100-x
Hence after evaporation w+ x =19 -------1 w is wt of water
100w+10x = 1000 -----2 on solving
x = 10 gm.
w = 9gr.
sample wt = 90 gm
so all the options are correct