Answer: Option 'B' is correct.
Step-by-step explanation:
since we have given that
Group radii of fertilized tomatoes is given by

Group radii of unfertilized tomatoes is given by

So, we will first find the mean of both the group i.e.
Mean radii of fertilized tomatoes is given by

Similarly,
Mean radii of unfertilized tomatoes is given by

So, the difference between the mean radii of fertilized and unfertilized tomatoes will be

Hence, Option 'B' is correct.