Water consists of hydrogen and oxygen, and the approximate ratio, by mass, of hydrogen to oxygen is 2:16. Approximately how many grams of hydrogen are there in 171 grams of water? Choose the correct choice from the following answers
A) 11 B) 13 C) 15 D) 17 E) 19

Rationale: "( 2 / 18 ) * 171 = 19 grams the answer is e ."
Answer: E