33) B

According to table 2, for a person aged 19+, 5 mg/kg of bodyweight of tryptophan is needed.
Weight of man = 70 kg
Mass of tryptophan needed = 70 x 5 = 350 mg

According to table 1, mass of protein intake = 0.8 x 70 = 56 g
Per gram of protein, 4 mg of tryptophan is consumed.
Since 56 g of protein is consumed, mass of tryptophan consumed = 56 x 4 = 224 mg

Difference = 350 – 224 = 126 mg