Consider the following expressions:
(i) x4+2
(ii) 73x−5
(iii) x2+1x2+4
(iv) x1+4
Which option correctly classifies them into polynomials and rational (non-polynomial) functions?
a) Polynomials: (i), (iii); Rational but not polynomial: (ii), (iv)
b) Polynomials: (i); Rational but not polynomial: (ii), (iii), (iv)
c) Polynomials: (i), (ii); Rational but not polynomial: (iii), (iv)
d) Polynomials: (i), (ii), (iii); Rational but not polynomial: (iv)