In the series a _ b _ abb _ ab _a _ bba
fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.
1
bbaab
2
babba
3
baaba
4
aabba
In the series a _ b _ abb _ ab _a _ bba
fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.