A conducting square loop edge length a and resistance R is in a uniform magnetic field B, perpendicularly. Two opposite corners of the loop are pulled apart as shown in fig., till it becomes straight, the charge flown through the loop will be -
![](https://www.sarthaks.com/?qa=blob&qa_blobid=2446035161345551676)
(A) Ba2
(B) 2Ba2/R
(C) Ba2/2R
(D) Zero