Correct Answer - Option 1 : Sita is not as pretty as Gita.
Gita is prettier than Sita but not as pretty as Rita, then
Rita > Gita > Sita
i) Sita is not as pretty as Gita. → True
ii) Sita is prettier than Rita. →False (as Rita is prettier than Sita)
iii) Rita is not as pretty as Gita. → False (as Rita is prettier than Sita)
iv) Gita is prettier than Rita. → False (as Rita is prettier than Gita)
Hence, 'Sita is not as pretty as Gita.' is the correct answer.