Task: Question Answering
Input (English): Problem: at the faculty of aerospace engineering , 312 students study random - processing methods , 234 students study scramjet rocket engines and 112 students study them both . if every student in the faculty has to study one of the two subjects , how many students are there in the faculty of aerospace engineering ? 
Options: a ) 430 , b ) 434 , c ) 438 , d ) 444 , e ) 446
Output (English): b