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The boiling point of acetic acid is 118.1°C and its latent heat of vaporisation is 121 cal/gm. A solution containing 0.4344 gm anthracene in 44.16 gm acetic acid boils at 118.24°C. What is the molecular wt. of anthracene ?

(a) 122

(b) 178

(c) 105

(d) 154