Answer :
The similarity between the religious war was that both resulted in Catholic leaders agreeing to limited tolerance of Protestantism.
What was the French Wars of Religion?
It was a period of civil war in 1598 between French Catholics and the Protestants called Huguenots.
What was Charles V's struggles against Protestant princes?
Charles V's struggled to hold his empire together against the growing forces of Protestantism and the increasing Ottoman & French pressure.
Hence, the similarity between the religious war was that both resulted in Catholic leaders agreeing to limited tolerance of Protestantism.
Therefore, the Option B is correct.
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