In the network shown below, switch is moved from position a to b at t = 0 . The current $$i_{L} (t)$$ for t>o is given as

A

$$(4-6t)e^{4t}A$$

B

$$(3-6t)e^{-4t}A$$

C

$$(3-9t)e^{-5t}A$$

D

$$(3-8t)e^{-5t}A$$