Which sentence contains a word that is spelled incorrectly?

Correct option is A

Option (a) is the incorrectly spelt word.
Correct spelling is: “ rehearsal” — a session of practice before a performance; a run-through done to prepare actors/musicians for the final show (Hindi: पूर्वाभ्यास/अभ्यास). Also, “ show” (not “shown”) is the correct noun for “big show.” “Shown” is the past participle of the verb show, not a noun.
Example: The cast had a final rehearsal before the opening show.
Meanings of all the given options:
· (a) rehearsal — a practice session before a performance (Hindi: पूर्वाभ्यास); show — a performance/event (Hindi: कार्यक्रम/प्रदर्शन)
· (b) parachute — a device that slows a person/object falling through the air (Hindi: पैराशूट)
· (c) assembly (hall) — a place where people gather for meetings or events (Hindi: सभागार)
· (d) vase — a decorative container for flowers (Hindi: फूलदान); shelf — a flat board for storing/displaying things (Hindi: तख्ता/शेल्फ़)