If it is possible to form a three-digit number which is the perfect square of a two-digit odd number with the third, the fifth and the eighth digits of the numbers 532784691, which of the following will be the second digit of that to-digit odd number ? If more than one such number can be formed, give '@' as the answer and if no such number can be formed, give `©` as the answer
1) 1
2) 7
3) 9
4) @
5) ©

Explanation

2, 7