Choose the correct alternative from the following : - Assertion (A) : The use of chlorofluoro carbons is banned throughout the world nowadays. Reason (R) : These chemicals cause skin cancer.
In the following number sequence, how many such even numbers are there which are exactly divisible by its immediate preceding number but not exactly divisible by its immediate following number ? 3 8 4 1 5 7 2 8 3 4 8 9 3 9 4 2 1 5 8 2