Task: Question Answering
Input (English): Problem: my grandson is about as many days as my son in weeks , and my grandson is as many months as i am in years . my grandson , my son and i together are 150 years . can you tell my son age in years ? 
Options: a ) 63 years , b ) 60 years , c ) 50 years , d ) 53 years , e ) 46 years
Output (English): d