Identify the part of the following sentence which has an error in it.
All kinds / of stationery / is / available here.

Correct option is C

Error part: (c) is
What is wrong (in detail):
• The real subject is “kinds” (plural).
• Therefore, the verb should be plural: are, not is.
Correct sentence: All kinds of stationery are available here.
Grammatical Rule (English):
• Verb agrees with the head noun of the subject: “kinds” (plural) → are.
व्याकरणिक नियम (Hindi):
• Verb का मिलान subject के मुख्य शब्द (head noun) से होता है। “kinds” बहुवचन है, इसलिए are आएगा, is नहीं।
Hence, option (c) is the correct answer.