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I think there is a typo in the question and d should be < so,

f 4 < x < 12, is the tens digit of x! prime?

(1) x is even
(2) x! has exactly 3 distinct prime factors

[I think we are also supposed to assume x is an integer, because it is not normal to have non-integer factorials, though it can be defined continuous with gamma functions. But way off topic for GMAT.]

Then (1) means x=6, 8, 10
x! = 720, 40320, 3628800
So tens digit x! = 2, 2, 0 (prime, prime, not-prime)
Not sufficient

Then (2)
the first four prime factors are 2,3,5,7
We must have first three, but not fourth.
So x=5 or x=6
x! = 120, 720 (prime, prime)
So sufficient assuming integers

So answer is B assuming integer x.

If not assuming integer X, answer is C, as we would have x=6, x!=720

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