In line "550 INPUT NUM: PRINT 6.9*NUM*NUM+27" of a BASIC program, 'PRINT and INPUT' is

In line "550 INPUT NUM: PRINT 6.9*NUM*NUM+27" of a BASIC program, 'PRI

1.	In line "550 INPUT NUM: PRINT 6.9NUMNUM+27" of a BASIC program, 'PRINT and INPUT' is
A.	reserved words
B.	reserved variable
C.	reserved constant
D.	reserved exponent
Answer» B. reserved variable