From what I've heard, Prof Biswas at NUH is often mentioned as a solid choice for C-sections, someone in my mum group said his work was really clean, like the scar was barely visible after. That said, for anxiety specifically, it's worth asking upfront how a gynae handles nervous patients, because some are more reassuring in their communication style than others, a technically skilled doctor isn't always the most hand-holding type, so those two things don't always come together. Going as a private patient at NUH gives you more say in who you see consistently throughout your pregnancy, which might help with your anxiety since you're building a relationship with one doctor rather than seeing whoever is on duty. I'd suggest calling the clinic and even asking the receptionist whether the doctor is known for being patient and thorough with anxious mums, sometimes that one question tells you a lot.