44ad & ada tax audit

Yes.... as per sec. 44AB of IT act, whenever professional receipt exceed 50 lakhs...

1. As per sec 44AB in case of a person who is engaged in the profession if his gross receipts exceed Rs. 50 lakhs during the year, he is required to carry out tax audit mandatorily. 
2. In your case doctor is a profession and since gross receipts exceed Rs. 50 lakhs tax audit as per sec 44AB is compulsory. The time limit for filing a return will be 30.09.2019. 
Please correct me if the above solution has an alternative view. 

CAPACITY OF TRUCK 40 TUN BUT UNLEDEN WAIT 10MT IS THIS HEAVY VEHICLE OR LIGHT VEHICLE

Heavy Vehicle. Consider Gross Weight as per RTO permission.

On that point clarification required to be issued by CBIC, as the phrase is just copied from RTO act.

Yes, it can be assessed u/s. 44ADA..... code '14005'