Rab is the resistance between the terminals A and B, Rbc between B and C and Rca between C and A. These 3 resistors are connected in delta connection. After transforming to star, the resistance at A will be?

• A. Rab*Rac/(Rab+Rbc+Rca)
• B. Rab/(Rab+Rbc+Rca)
• C. Rbc*Rac/(Rab+Rbc+Rca)
• D. Rac/(Rab+Rbc+Rca)