How many prime numbers are between 51/13 and 89/9? Select:
A) 0
B) 1
C) 2
D) 3
E) 4

Rationale: "51 / 13 = 4 - 89 / 9 = 10 - prime numbers between 4 and 10 are 5 and 7 - sign signifies that the number is marginally less . answer c"
Answer: C