Directions : Each of the next items consists of two statements, one labelled as the `Assertion (A)' and the other as 'Reason (R)' You are to examine these two statements carefully and select the answers to these items using the codes given below : Assertion (A): Concentration of acceptor atoms in the region between isolation islands will be much higher p*.than in the p type substrate in an integrated circuit.Reason (R): This is to prevent the depletion region ' of the reverse-biased isolation to substrate junction from extending into pi" type material.

• A. Both A and R are individually true and R is the correct explanation of A
• B. Both A and R are individually true but R is not the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true