IT Notice under 148a(a) and 148a(b) section for AY 17-18

Hello, 

I'm a former NRI and recently got an IT notice for 148a(a) and 148a(b) for AY 17-18.

I was a non-resident in AY 17-18. 

I did some FDs in my savings account and they asking for the source of funds. 

I already replied to the 148a(a) letter myself with a, but I got 148a(b) after that. I think they might not have read the explanaton. 

I attached all bank statements they asked in a single pdf and explained the source of funds for the FDs (mostly reinvestment of matured FDs and rest are funded from my NRE account) at the bottom of the pdf. 

Please let me know if you can help me on this to reply back to IT dept. 

Thanks
Rajib