Which of the following is true about the growth cha shown below?

Discussing about the options one by one, a. False; It is the weight for age growth cha, not a growth velocity cha b. False; Wasting is decrease in weight for height, but this is a weight for age cha e. True; It is used for serial assessment of growth status of a girl c. False; It can be used to detect 'failure to thrive' i.e. not gaining weight properly