If $$a \triangle b = \frac{a}{b} + \frac{b}{a}$$ and $$a * b = ab + \frac{1}{ab}$$ then $$(1 \triangle 2) * 4 =$$

A

$$10\frac{1}{5}$$

B

$$9\frac{1}{9}$$

C

$$10\frac{1}{10}$$

D

$$10\frac{1}{2}$$