The possible sources of early organic molecules would be inorganic molecules forming into more complex organic ones using energy from lightning. The correct option is the 2nd option.
The first organic molecules are hypothesized to have been formed from simple inorganic molecules such as water vapor, methane, and ammonia.
Their dissolution to form the 'chemical soup' is said to have led to their formation with reactions within the chemical soup driven largely by lightning and UV rays.
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