Which of the following relationships is true?

W) 1 food calorie is equal to 4.18 kiljoules

X) 1 joule is equal to 1 food calorie

Y) 1 joule is equal to 4.18 food calories

Z) 1 food calorie is equal to 4.18 joules
W) 1 FOOD CALORIE IS EQUAL TO 4.18 KILOJOULES