A fair die is thrown n times. The probability of getting an odd number twice is equal to that getting an even number thrice. The probability of getting an odd number, odd number of times is
(1) $1\over3$
(2) $1\over6$
(3) $1\over2$
(4) $1\over8$
(1) $1\over3$
(2) $1\over6$
(3) $1\over2$
(4) $1\over8$