What is the specific fuel requirement for flight under vfr at night in an airplane?
a) enough to fly to the first point of intended landing and to fly after that for 45 minutes at normal cruising speed.
b) enough to complete the flight at normal cruising speed with adverse wind conditions.
c) enough to fly to the first point of intended landing and to fly after that for 30 minutes at normal cruising speed.

A). Enough to fly to the first point of intended landing and to fly after that for 45 minutes at normal cruising speed

Explanation:

Here are Fuel requirements for flight in VFR conditions

No person may begin a flight in an airplane under VFR conditions unless  there is enough fuel to fly to the first point of intended landing and, assuming normal cruising speed -

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =