Correct option is B
Option (b) is the incorrectly spelt word.
Correct Spelling: Tyranny — It refers to cruel and oppressive government or rule. (Hindi: अत्याचारी शासन)
Example: The people finally rose against years of tyranny and demanded democracy.
Meanings of all the given options:
· (a) Tranquility: a state of calmness and peace. (Hindi: शांति)
· (b) Tyrany: Incorrect spelling of “tyranny”.
·(c) Serenity: a condition of being calm and untroubled. (Hindi: शांति पूर्ण स्थिति)
· (d) Harmony: a pleasing arrangement of parts; agreement. (Hindi: सद्भाव/सामंजस्य)