Any plans to offer CCIE Data Center Course Training?

I have already done CCIE R&S course in 2011. Now i am planning to start preparing for CCNA DC, CCNP DC and CCIE DC V2 Certification Training. I am currently working in Gurgaon.

Which Routing Protocol is better for entreprise networks? How OSPF is different from EIGRP, and which one is better for a complex network?

I want to know that How many questions are there in Cisco CCNA R&S Certification exam and what kind of questions come in exam generally?

What is the passing percentage or marks required to pass CCNA Certification successfully?