What is the total number of prime numbers less than 70?  Choose the correct choice from the following answers
A) 17  B) 18  C) 19  D) 20  E) 21

Rationale: solution prime numbers less than 70 are = 12 . 2,3 , 5,7 , 11,13 , 17,19 , 23,29 , 31,37 , 41,43 , 47,53 , 59,61 , and 67 their number is 19 . answer c
Answer: C