Which daily soap opera, produced by Ekta Kapoor's Balaji Telefilms and airing from 2000 to 2008, became a cultural phenomenon and defined the 'saas-bahu' genre with its iconic character Tulsi Virani?

• A Kyunki Saas Bhi Kabhi Bahu Thi ✓
• B Kahaani Ghar Ghar Kii
• C Kasautii Zindagii Kay
• D Kkusum

Kyunki Saas Bhi Kabhi Bahu Thi, starring Smriti Irani as Tulsi, was a ratings juggernaut that established Ekta Kapoor as the queen of Indian television melodrama.