Gst- itc mismatch between gstr 3b & gstr 2a

Dear all,

We have kept certain amount say 1lakh as Input tax credit in GSTR 3B and further reversed it as ineligible credit. So effectively we did not claim any ITC.

But we have received notice from Asst. Commissioner saying that there is ITC mismatch between GSTR 2A (90K) and GSTR 3B (1lakh) and reply has to be given with in 1month.

What is the solution and how can we move forward as we have claimed Zero ITC though mentioned 1Lakh (which is as per accounts).