6863. He was given to fanaticism in his political beliefs.

✅ The correct answer is option B.
Limitations : a limiting rule or circumstance; a restriction.

Enthusiasm : intense and eager enjoyment, interest, or approval.

Falsehood : the state of being untrue.

Grounds : the solid surface of the earth.

Fanaticism : the quality of being fanatical; filled with excessive and single-minded zeal.

Synonym of Fanaticism is Enthusiasm