Is the hundredths digit of the decimal d greater than 5?

1. The tenths digit of 10d is 7
2. The thousandths digit of d/10 is 7

Ans. D

Please confirm if my logic is right.

Let's say the number is abc.Xde
They are asking if X>5

1. 10d = 10*abc.Xde = abcX.de - where d=7 - nothing about X
2. d/10 = abc.Xde/10 = ab,cXde - where c=7 - again nothing about X

The answer is D - each statement Alone is sufficient, because you answer NO to each statement? I mean NO, 7 is not the tenths digit and No, 7 is not the thousandths?