Correct Answer - Option 2 :
Only assumption II is implicit
I. The auto-rickshaw driver may be able to steer his vehicle away from the oncoming truck - not implicit.
The driver does not have control on what the auto driver will do, so we can not assume that the action taken by truck driver Hence, I is invalid.
II. The truck driver may be able to stop the truck before it hits the autorickshaw - implicit
But II is a valid assumption because if one takes an action he assumes its outcome.
Hence, only assumption II is implicit.