My brother asks so many questions

Hi guys 

not sure if I’m in the right place but my brother is 58 and since a young child has always asked questions but it’s like being cross examined in a courtroom at times and as he’s got older it’s worse , I have never had any patience with him and can’t spend too much time in his company as I can’t stand the questions , I’ve always just thought he was annoying but beginning to think he has a ASD, A typical scenario would be 

Me: we just had curry for tea , his questions would then be , did you have it planned ?was it takeaway , have you used them before ?what did you have ? What did Steve have ? How often do you have a curry , how much was it ? Where did you order from before ? Why did you change ? Do they charge for delivery ? Why wouldn’t you go with someone who offered free delivery ! Etc etc etc and these are just an example of a reply to me saying I had a curry ! What I would like to know is this some form of autism as if it is , I would change my attitude towards him in a heartbeat as I love my brother , how would I respond to his questions? ? he is totally in denial about having any problem ! He’s married with a 15 year old son who has his own issues 

any help would be much appreciated  , thank you in advance