Multiple choice question for engineering Set 1 1. Let R1 and R2 be regular sets defined over alphabet ∑ then a) R1 UNION R2 is regular b) R1 INTERSECTION R2 is regular c) ∑ INTERSECTION R2 IS NOT REGULAR d) R2* IS NOT REGULAR AnswerAnswer: a [Reason:] Union of 2 regular languages is regular. 2….