Assertion (A): Holes are majority carriers in p type semiconductor.

Reason (R): In p type semiconductor, the electrons produced by thermal agitation recombine with holes.

Match the following:

1. An arithmetic operation between integer and an integer gives integer as the result.
2. An arithmetic operation between a real and a real constant gives real constant as the result.
3. An arithmetic operation between an integer constant and a real constant is not valid.

1. simple circuitry
2. ability to track and scan simultaneously
3. ability to track many targets together
4. very fast scanning