Correct option is A
The original series is:
18 @ 61 # 22 63 76 $ 42 48 % 29 94 ∅ 56 27 75
After removing the symbols (@, #, $, %, ∅), we get:
18 61 22 63 76 42 48 29 94 56 27 75
So, the product of the numbers which are third from the right end and fourth from the left end =56×63 = 3528
Thus, correct option is (a).